Support Uniform Bucket Level Access on GCP

[nikolaydrm]

Thanks for contributing to cloud_controller_ng. To speed up the process of reviewing your pull request please provide us with:

• A short explanation of the proposed change:
  Blobstore component supports Uniform Bucket Level Access (UBLA) permission to buckets on GCP.

• An explanation of the use cases your change solves
  GCP Assured Workloads type of landscapes restricts the blobstore access to UBLA only: the fine-grained, aka ACL, the cloud_controller_ng support is not allowed.

• Links to any other associated PRs
  fog-google library recently added UBLA support with Add uniform attr to inserting file fog/fog-google#600.

• I have reviewed the contributing guide

• I have viewed, signed, and submitted the Contributor License Agreement
  I contribute on behalf of SAP

• I have made this pull request to the main branch

• I have run all the unit tests using bundle exec rake

• I have run CF Acceptance Tests

[linux-foundation-easycla]

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[johha]

Closed in favor of #3463