Minor Description
As per documentation: https://solr.apache.org/guide/8_9/making-and-restoring-backups.html#gcsbackuprepository states that:
gcsCredentialPath}}A path on the local filesystem (accessible by Solr) to a Google Cloud service account key file. If not specified, GCSBackupRepository will use the value of the {{GCS_CREDENTIAL_PATH environment variable. If both values are absent, an error will be thrown as GCS requires credentials for most usage.
This however makes it more complicated if someone (like me) runs solr in GCP and uses roles for rights assignment. Long story short, would it be possible to allow built-in roles (so credentialless) to access resources without providing any creds?
