[Hudi Observability] Framework for reporting stats from executors

Hudi Observability framework to report stats from executors, using the distributed registry.
- Hudi Write Stage Performance stats.
- Bloom Index stage stats.

## JIRA info

- Link: https://issues.apache.org/jira/browse/HUDI-1643
- Type: New Feature

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## Comments

07/Sep/21 21:43;githubbot;hudi-bot commented on pull request #2607:
URL: https://github.com/apache/hudi/pull/2607#issuecomment-914648067

## CI report:

* 189503c28d07f874827e91479d78a4869d8b491c UNKNOWN


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07/Sep/21 21:46;githubbot;hudi-bot edited a comment on pull request #2607:
URL: https://github.com/apache/hudi/pull/2607#issuecomment-914648067

## CI report:

* 189503c28d07f874827e91479d78a4869d8b491c Azure: [FAILURE](https://dev.azure.com/apache-hudi-ci-org/785b6ef4-2f42-4a89-8f0e-5f0d7039a0cc/_build/results?buildId=2084)


Bot commands
@hudi-bot supports the following commands:

- `@hudi-bot run travis` re-run the last Travis build
- `@hudi-bot run azure` re-run the last Azure build

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