Describe the bug
The GCPStorageConfiguration bean may cause an exception during application startup due to circular references. This seems to be connected the bean provider for the PlacementService in this class.

To Reproduce
Add spring-content-gcs to a Spring Boot 3 application and enable GCP Storage.

Expected behavior
The GCPStorageConfiguration bean should be created without error.

Additional context
Previous similar issue for AzureStorageConfiguration bean #1431.

I can provide a PR to make a similar fix as the Azure issue.