add new default lintable kind arg_specs for role argument validation based on argument specification

Beginning with ansible version 2.11 role argument validation based on an
argument specification was introduced. This specification is defined in
the meta/argument_specs.yml file of a role.

This change enables the linter to detect this new format and for it to
be used in future rules.

Fixes: #1688

Signed-off-by: Daniel Ziegenberg <daniel@ziegenberg.at>

Author: ziegenberg

src/ansiblelint/config.py

@@ -22,6 +22,7 @@
     {"handlers": "**/handlers/*.{yaml,yml}"},
     {"vars": "**/{host_vars,group_vars,vars,defaults}/**/*.{yaml,yml}"},
     {"meta": "**/meta/main.{yaml,yml}"},
+    {"arg_specs": "**/roles/**/meta/argument_specs.{yaml,yml}"},  # role argument specs
     {"yaml": ".config/molecule/config.{yaml,yml}"},  # molecule global config
     {
         "requirements": "**/molecule/*/{collections,requirements}.{yaml,yml}"

test/test_file_utils.py

@@ -165,6 +165,7 @@ def test_discover_lintables_umlaut(monkeypatch: MonkeyPatch) -> None:
             "roles/foo/molecule/scenario3/collections.yml",
             "requirements",
         ),  # requirements
+        ("roles/foo/meta/argument_specs.yml", "arg_specs"),  # role argument specs
         # tasks files:
         ("tasks/directory with spaces/main.yml", "tasks"),  # tasks
         ("tasks/requirements.yml", "tasks"),  # tasks