[Backport 2.x] Disallow removing some metadata fields by remove ingest processor

[gaobinlong]

Description

Backport #10895.

Related Issues

#10732

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Failing checks are inspected and point to the corresponding known issue(s) (See: Troubleshooting Failing Builds)
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)
• Public documentation issue/PR created

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[github-actions]

Compatibility status:

Checks if related components are compatible with change fe42a5a

Incompatible components

Incompatible components: [https://github.com/opensearch-project/performance-analyzer.git]

Skipped components

Compatible components

Compatible components: [https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/security-analytics.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/custom-codecs.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/ml-commons.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/sql.git]

[github-actions]

✅ Gradle check result for fe42a5a: SUCCESS

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (c5730ba) 71.15% compared to head (fb1a7c6) 70.96%.

Files	Patch %	Lines
.../org/opensearch/ingest/common/RemoveProcessor.java	88.88%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #11311      +/-   ##
============================================
- Coverage     71.15%   70.96%   -0.19%     
+ Complexity    59161    59059     -102     
============================================
  Files          4869     4869              
  Lines        278660   278669       +9     
  Branches      40831    40836       +5     
============================================
- Hits         198271   197755     -516     
- Misses        63605    64171     +566     
+ Partials      16784    16743      -41     

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[github-actions]

❌ Gradle check result for fb1a7c6: 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?

[gaobinlong]

Flaky test: #11032.

[github-actions]

❕ Gradle check result for fb1a7c6: UNSTABLE

• TEST FAILURES:

      1 org.opensearch.smoketest.SmokeTestMultiNodeClientYamlTestSuiteIT.test {yaml=pit/10_basic/Delete all}
      1 org.opensearch.cluster.allocation.ClusterRerouteIT.testDelayWithALargeAmountOfShards

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