[Backport 2.x] Reject bulk requests with invalid actions (#5302)

[adnapibar]

Description

Backport #5302

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Signed-off-by: Rabi Panda adnapibar@gmail.com

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/7362/
• CommitID: 27ae2c7

[codecov-commenter]

Codecov Report

Merging #5384 (27ae2c7) into 2.x (9c68587) will decrease coverage by 0.01%.
The diff coverage is 66.66%.

@@             Coverage Diff              @@
##                2.x    #5384      +/-   ##
============================================
- Coverage     70.64%   70.62%   -0.02%     
+ Complexity    58334    58323      -11     
============================================
  Files          4700     4700              
  Lines        279089   279092       +3     
  Branches      40750    40751       +1     
============================================
- Hits         197167   197116      -51     
- Misses        65513    65523      +10     
- Partials      16409    16453      +44     

Impacted Files	Coverage Δ
.../org/opensearch/action/bulk/BulkRequestParser.java	78.26% <66.66%> (-0.75%)	⬇️
...n/indices/forcemerge/ForceMergeRequestBuilder.java	0.00% <0.00%> (-75.00%)	⬇️
...ch/transport/ReceiveTimeoutTransportException.java	50.00% <0.00%> (-50.00%)	⬇️
...cluster/coordination/PendingClusterStateStats.java	20.00% <0.00%> (-48.00%)	⬇️
...pensearch/action/ingest/DeletePipelineRequest.java	31.25% <0.00%> (-37.50%)	⬇️
...ion/admin/cluster/node/info/PluginsAndModules.java	53.12% <0.00%> (-34.38%)	⬇️
.../indices/forcemerge/TransportForceMergeAction.java	25.00% <0.00%> (-33.34%)	⬇️
...search/aggregations/pipeline/HoltWintersModel.java	21.47% <0.00%> (-30.88%)	⬇️
...rc/main/java/org/opensearch/ingest/IngestInfo.java	51.72% <0.00%> (-27.59%)	⬇️
...opensearch/index/reindex/BulkByScrollResponse.java	48.38% <0.00%> (-27.42%)	⬇️
... and 441 more

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