Add metadata transformations with metadata tuples

Description

[Describe what this change achieves]

Category (Enhancement, New feature, Bug fix, Test fix, Refactoring, Maintenance, Documentation)
Why these changes are required?
What is the old behavior before changes and new behavior after changes?

Issues Resolved

[List any issues this PR will resolve]

Is this a backport? If so, please add backport PR # and/or commits #

Testing

[Please provide details of testing done: unit testing, integration testing and manual testing]

Check List

[ ] New functionality includes testing
- [ ] All tests pass, including unit test, integration test and doctest
[ ] New functionality has been documented
[ ] Commits are signed per the DCO using --signoff

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 80.84%. Comparing base (892990a) to head (488c664).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1148 +/- ## ============================================ + Coverage 80.78% 80.84% +0.06% - Complexity 2947 2983 +36 ============================================ Files 399 406 +7 Lines 15089 15215 +126 Branches 1017 1019 +2 ============================================ + Hits 12190 12301 +111 - Misses 2288 2289 +1 - Partials 611 625 +14 ``` | [Flag](https://app.codecov.io/gh/opensearch-project/opensearch-migrations/pull/1148/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/opensearch-project/opensearch-migrations/pull/1148/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) | `80.84% <ø> (+0.06%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project#carryforward-flags-in-the-pull-request-comment) to find out more.

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opensearch-project / opensearch-migrations