Allow users to ban lazy imports (#23847)

## Summary

This PR renames TID254 to `lazy-import-mismatch` and expands it into a
single rule with two complementary settings: `require-lazy` and
`ban-lazy`. Both settings accept `"all"`, `list[str]`, or `{ include =
..., exclude = [...] }`, and we validate that the two selectors don’t
overlap.

This covers the two main use-cases users asked for:

- Require lazy imports by default, except for known side-effectful
modules. Example:

  ```toml
  require-lazy = { include = "all", exclude = ["sitecustomize"] }
  ```
This enforces lazy imports everywhere Ruff can rewrite them, while
leaving sitecustomize eager.

- Forbid lazy imports for modules that must stay eager, or even forbid
lazy imports by default with a small allowlist.

  ```toml
  # Require `sitecustomize` to stay eager.
  ban-lazy = ["sitecustomize"]

  # Ban lazy imports everywhere except `typing`.
  ban-lazy = { include = "all", exclude = ["typing"] }
  ```

Author: charliermarsh

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_extend_from_shared_config.snap

@@ -182,7 +182,8 @@ linter.flake8_self.ignore_names = [
 linter.flake8_tidy_imports.ban_relative_imports = "parents"
 linter.flake8_tidy_imports.banned_api = {}
 linter.flake8_tidy_imports.banned_module_level_imports = []
-linter.flake8_tidy_imports.banned_eager_imports = []
+linter.flake8_tidy_imports.require_lazy = []
+linter.flake8_tidy_imports.ban_lazy = []
 linter.flake8_type_checking.strict = false
 linter.flake8_type_checking.exempt_modules = [
 	typing,

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_no_tool.snap

@@ -184,7 +184,8 @@ linter.flake8_self.ignore_names = [
 linter.flake8_tidy_imports.ban_relative_imports = "parents"
 linter.flake8_tidy_imports.banned_api = {}
 linter.flake8_tidy_imports.banned_module_level_imports = []
-linter.flake8_tidy_imports.banned_eager_imports = []
+linter.flake8_tidy_imports.require_lazy = []
+linter.flake8_tidy_imports.ban_lazy = []
 linter.flake8_type_checking.strict = false
 linter.flake8_type_checking.exempt_modules = [
 	typing,

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_no_tool_preview_enabled.snap

@@ -191,7 +191,8 @@ linter.flake8_self.ignore_names = [
 linter.flake8_tidy_imports.ban_relative_imports = "parents"
 linter.flake8_tidy_imports.banned_api = {}
 linter.flake8_tidy_imports.banned_module_level_imports = []
-linter.flake8_tidy_imports.banned_eager_imports = []
+linter.flake8_tidy_imports.require_lazy = []
+linter.flake8_tidy_imports.ban_lazy = []
 linter.flake8_type_checking.strict = false
 linter.flake8_type_checking.exempt_modules = [
 	typing,

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_no_tool_target_version_override.snap

@@ -186,7 +186,8 @@ linter.flake8_self.ignore_names = [
 linter.flake8_tidy_imports.ban_relative_imports = "parents"
 linter.flake8_tidy_imports.banned_api = {}
 linter.flake8_tidy_imports.banned_module_level_imports = []
-linter.flake8_tidy_imports.banned_eager_imports = []
+linter.flake8_tidy_imports.require_lazy = []
+linter.flake8_tidy_imports.ban_lazy = []
 linter.flake8_type_checking.strict = false
 linter.flake8_type_checking.exempt_modules = [
 	typing,

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_pyproject_toml_above.snap

@@ -183,7 +183,8 @@ linter.flake8_self.ignore_names = [
 linter.flake8_tidy_imports.ban_relative_imports = "parents"
 linter.flake8_tidy_imports.banned_api = {}
 linter.flake8_tidy_imports.banned_module_level_imports = []
-linter.flake8_tidy_imports.banned_eager_imports = []
+linter.flake8_tidy_imports.require_lazy = []
+linter.flake8_tidy_imports.ban_lazy = []
 linter.flake8_type_checking.strict = false
 linter.flake8_type_checking.exempt_modules = [
 	typing,

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_pyproject_toml_above_with_tool.snap

@@ -184,7 +184,8 @@ linter.flake8_self.ignore_names = [
 linter.flake8_tidy_imports.ban_relative_imports = "parents"
 linter.flake8_tidy_imports.banned_api = {}
 linter.flake8_tidy_imports.banned_module_level_imports = []
-linter.flake8_tidy_imports.banned_eager_imports = []
+linter.flake8_tidy_imports.require_lazy = []
+linter.flake8_tidy_imports.ban_lazy = []
 linter.flake8_type_checking.strict = false
 linter.flake8_type_checking.exempt_modules = [
 	typing,

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_ruff_toml_above-2.snap

@@ -182,7 +182,8 @@ linter.flake8_self.ignore_names = [
 linter.flake8_tidy_imports.ban_relative_imports = "parents"
 linter.flake8_tidy_imports.banned_api = {}
 linter.flake8_tidy_imports.banned_module_level_imports = []
-linter.flake8_tidy_imports.banned_eager_imports = []
+linter.flake8_tidy_imports.require_lazy = []
+linter.flake8_tidy_imports.ban_lazy = []
 linter.flake8_type_checking.strict = false
 linter.flake8_type_checking.exempt_modules = [
 	typing,

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_ruff_toml_above.snap

@@ -182,7 +182,8 @@ linter.flake8_self.ignore_names = [
 linter.flake8_tidy_imports.ban_relative_imports = "parents"
 linter.flake8_tidy_imports.banned_api = {}
 linter.flake8_tidy_imports.banned_module_level_imports = []
-linter.flake8_tidy_imports.banned_eager_imports = []
+linter.flake8_tidy_imports.require_lazy = []
+linter.flake8_tidy_imports.ban_lazy = []
 linter.flake8_type_checking.strict = false
 linter.flake8_type_checking.exempt_modules = [
 	typing,

crates/ruff/tests/cli/snapshots/cli__lint__requires_python_ruff_toml_no_target_fallback.snap

@@ -182,7 +182,8 @@ linter.flake8_self.ignore_names = [
 linter.flake8_tidy_imports.ban_relative_imports = "parents"
 linter.flake8_tidy_imports.banned_api = {}
 linter.flake8_tidy_imports.banned_module_level_imports = []
-linter.flake8_tidy_imports.banned_eager_imports = []
+linter.flake8_tidy_imports.require_lazy = []
+linter.flake8_tidy_imports.ban_lazy = []
 linter.flake8_type_checking.strict = false
 linter.flake8_type_checking.exempt_modules = [
 	typing,

crates/ruff/tests/snapshots/show_settings__display_default_settings.snap

@@ -295,7 +295,8 @@ linter.flake8_self.ignore_names = [
 linter.flake8_tidy_imports.ban_relative_imports = "parents"
 linter.flake8_tidy_imports.banned_api = {}
 linter.flake8_tidy_imports.banned_module_level_imports = []
-linter.flake8_tidy_imports.banned_eager_imports = []
+linter.flake8_tidy_imports.require_lazy = []
+linter.flake8_tidy_imports.ban_lazy = []
 linter.flake8_type_checking.strict = false
 linter.flake8_type_checking.exempt_modules = [
 	typing,