[Backport 2.x] Add wait_for_completion parameter to resize, open, and forcemerge APIs

[gaobinlong]

Description

Backport 3fec567 from #6434.

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.backwards.MixedClusterClientYamlTestSuiteIT.test {p0=pit/10_basic/Delete all}

• URL: https://build.ci.opensearch.org/job/gradle-check/12986/
• CommitID: 2083ef3
  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-commenter]

Codecov Report

Merging #6855 (2083ef3) into 2.x (8356d2b) will decrease coverage by 0.01%.
The diff coverage is 44.04%.

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@@             Coverage Diff              @@
##                2.x    #6855      +/-   ##
============================================
- Coverage     70.39%   70.39%   -0.01%     
+ Complexity    59459    59455       -4     
============================================
  Files          4808     4808              
  Lines        285371   285437      +66     
  Branches      41490    41497       +7     
============================================
+ Hits         200896   200933      +37     
- Misses        67666    67737      +71     
+ Partials      16809    16767      -42     

Impacted Files	Coverage Δ
.../index/reindex/AbstractBaseReindexRestHandler.java	6.66% <ø> (+0.69%)	⬆️
...on/admin/indices/forcemerge/ForceMergeRequest.java	48.71% <0.00%> (-4.06%)	⬇️
...main/java/org/opensearch/rest/BaseRestHandler.java	69.33% <0.00%> (-7.14%)	⬇️
...rest/action/admin/indices/RestOpenIndexAction.java	34.78% <0.00%> (-22.37%)	⬇️
...h/rest/action/admin/indices/RestResizeHandler.java	53.33% <8.33%> (-14.32%)	⬇️
...est/action/admin/indices/RestForceMergeAction.java	64.70% <16.66%> (-26.97%)	⬇️
...rch/action/admin/indices/shrink/ResizeRequest.java	59.43% <57.14%> (+4.13%)	⬆️
...ch/action/admin/indices/open/OpenIndexRequest.java	91.66% <60.00%> (+36.82%)	⬆️
...n/admin/indices/forcemerge/ForceMergeResponse.java	90.47% <100.00%> (+4.76%)	⬆️
...h/action/admin/indices/open/OpenIndexResponse.java	100.00% <100.00%> (ø)
... and 3 more

... and 489 files with indirect coverage changes

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[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/13009/
• CommitID: b2bb97c
  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]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.backwards.MixedClusterClientYamlTestSuiteIT.test {p0=pit/10_basic/Delete all}

• URL: https://build.ci.opensearch.org/job/gradle-check/13015/
• CommitID: 130acac
  Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[gaobinlong]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/13009/
• CommitID: b2bb97c
  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?

I've fixed this failure by removing an unused package which causes the spotlessJavaCheck task to fail. By the way, I've changed the package name in some files within this PR, because we renamed the package org.opensearch.common to org.opensearch.core.

[gaobinlong]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❕
• TEST FAILURES:

      1 org.opensearch.backwards.MixedClusterClientYamlTestSuiteIT.test {p0=pit/10_basic/Delete all}

• URL: https://build.ci.opensearch.org/job/gradle-check/13015/
• CommitID: 130acac
  Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

This unstable test case seems to be a flaky test.