Revert "Revert "Generate semconv/v1.40.0" (#7978)"

This reverts commit 0d50f90.

Author: MrAlias

CHANGELOG.md

@@ -16,6 +16,9 @@ The next release will require at least [Go 1.25].
 ### Added
 
 - Support testing of [Go 1.26]. (#7902)
+- Add `go.opentelemetry.io/otel/semconv/v1.40.0` package.
+  The package contains semantic conventions from the `v1.40.0` version of the OpenTelemetry Semantic Conventions.
+  See the [migration documentation](./semconv/v1.40.0/MIGRATION.md) for information on how to upgrade from `go.opentelemetry.io/otel/semconv/v1.39.0.`(#7929)
 
 ### Fixed
 

semconv/v1.40.0/MIGRATION.md

@@ -0,0 +1,4 @@
+<!-- Generated. DO NOT MODIFY. -->
+# Migration from 1.39.0 to v1.40.0
+
+The `go.opentelemetry.io/otel/semconv/v1.40.0` package should be a drop-in replacement for `go.opentelemetry.io/otel/semconv/1.39.0`.

semconv/v1.40.0/README.md

@@ -0,0 +1,3 @@
+# Semconv v1.40.0
+
+[![PkgGoDev](https://pkg.go.dev/badge/go.opentelemetry.io/otel/semconv/v1.40.0)](https://pkg.go.dev/go.opentelemetry.io/otel/semconv/v1.40.0)