Added initial implementation for Google Cloud Storage

[amankrx]

Description

This PR implements the Google Cloud Store implementation and closely aligns with the AWS S3 implementation.
This utilizes the google protos. There were three primary options that I considered here (gcloud_sdk_rs, googleapis-tonic-google-storage-control-v2, or building it locally). Out of all these three options, googleapis-tonic-google-storage-control-v2 seemed to have the easiest approach to just use the rust bindings, without importing a number of libraries like reqwest, etc.

Following the same approach I used for Azure Blob Storage, I started my development by first creating a POC: https://gist.github.com/amankrx/d3861756e00e0d5157cd4230477b4024
This POC tests the operations that we will be performing in the real implementation.

A few points to consider:

• This still requires an E2E testing to confirm that it works.
• This just has one way of authentication at the moment i.e.: using token, and that is valid for an hour.
• I will have to add some integration tests along with a Mock client.

Fixes #659
/claim #659

Type of change

Please delete options that aren't relevant.

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

Please also list any relevant details for your test configuration

Checklist

• Updated documentation if needed
• Tests added/amended
• Local tests completed
• bazel test //... passes locally
• PR is contained in a single commit, using git amend see some docs

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This change is 

[asr2003]

Similar to #1547

Dear reviewers, There are many ways to do, I have connected with Community and finally approached with tonic/grpc solution. I do argue to get my PR reviewed first as I have went throughout many discussions with community members and landed solution there. Just waiting to the response from reviewers of mocking client approach we going to take