[HUDI-2438][RFC-34] Hudi BigQuery Integration RFC

[vingov]

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What is the purpose of the pull request

This pull request adds the implementation details for the Hudi BigQuery integration RFC-34.

Brief change log

• RFC-34 Hudi BigQuery Integration details were updated.

Verify this pull request

(Please pick either of the following options)

This pull request is a trivial rework / code cleanup without any test coverage.

Committer checklist

• Has a corresponding JIRA in PR title & commit

• Commit message is descriptive of the change

• CI is green

• Necessary doc changes done or have another open PR

• For large changes, please consider breaking it into sub-tasks under an umbrella JIRA.

[vingov]

@xushiyan or @vinothchandar - We already discussed this PR and agreed to commit it, since that PR had merge conflicts I tried to rebase and update the PR, but I used the wrong commands and messed up that PR.

I will close that other PR, please merge this one.

[hudi-bot]

CI report:

• 114ca2e Azure: CANCELED

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