Added support for the integration with Secret Manager in Cloud Run. (#4739) (#3225)

* Added support for the integration with Secret Manager in Cloud Run Managed.
The integration enables binding secret values to environment variables or
to the content of files.

* Revert "Added support for the integration with Secret Manager in Cloud Run Managed."

This reverts commit 2170b507ee540108a8f08641e4997c9d449f2e28.

* Added support for the integration with Secret Manager in Cloud Run Managed.

The integration enables binding secret values to environment variables or
to the content of files.

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/4739.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+cloudrun: added support to bind secrets from Secret Manager to environment variables or files to `google_cloud_run_service`
+```