Clean generated _api folders from docs directories in prepare-provider-distributions (#62573)

The prepare-provider-distributions command now removes all generated
_api folders from docs directories across the repository before
building provider packages. These folders are generated by Sphinx
during documentation builds and can interfere with clean builds.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: potiuk

dev/breeze/src/airflow_breeze/commands/release_management_commands.py

@@ -1130,6 +1130,11 @@ def prepare_provider_distributions(
     perform_environment_checks()
     fix_ownership_using_docker()
     cleanup_python_generated_files()
+    get_console().print("\n[info]Cleaning generated _api folders from docs directories")
+    for api_dir in AIRFLOW_ROOT_PATH.rglob("docs/_api"):
+        if api_dir.is_dir():
+            shutil.rmtree(api_dir, ignore_errors=True)
+            get_console().print(f"[info]Removed {api_dir}")
     distributions_list_as_tuple: tuple[str, ...] = ()
     if distributions_list and len(distributions_list):
         get_console().print(