[Backport 2.x] Remove resource usages object from search response headers

[opensearch-trigger-bot[bot]]

Backport 80ca32fe9f99165a322e115605027a4df7695f1e from #16532.

[github-actions[bot]]

:x: Gradle check result for d8ff817e0460576319ba7dba54d02f21c53a92f5: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions[bot]]

:x: Gradle check result for d8ff817e0460576319ba7dba54d02f21c53a92f5: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions[bot]]

:grey_exclamation: Gradle check result for d8ff817e0460576319ba7dba54d02f21c53a92f5: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[codecov[bot]]

Codecov Report

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

Project coverage is 71.79%. Comparing base (bdb725d) to head (d8ff817). Report is 2 commits behind head on 2.x.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## 2.x #16536 +/- ## ============================================ - Coverage 71.90% 71.79% -0.12% + Complexity 65421 65385 -36 ============================================ Files 5312 5312 Lines 305004 305011 +7 Branches 44440 44440 ============================================ - Hits 219319 218968 -351 - Misses 67401 67802 +401 + Partials 18284 18241 -43 ```

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