[Backport 2.2] Add release notes for 2.2.0.0 release

[opensearch-trigger-bot]

Backport 62cf906 from #1974

[codecov-commenter]

Codecov Report

Merging #1993 (dad6648) into 2.2 (d375be2) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.2    #1993      +/-   ##
============================================
- Coverage     61.07%   61.03%   -0.04%     
+ Complexity     3236     3232       -4     
============================================
  Files           256      256              
  Lines         18085    18085              
  Branches       3222     3222              
============================================
- Hits          11045    11038       -7     
- Misses         5466     5471       +5     
- Partials       1574     1576       +2     

Impacted Files	Coverage Δ
...urity/ssl/transport/SecuritySSLNettyTransport.java	62.36% <0.00%> (-4.31%)	⬇️
...earch/security/ssl/util/SSLConnectionTestUtil.java	93.18% <0.00%> (-2.28%)	⬇️
...iance/ComplianceIndexingOperationListenerImpl.java	61.76% <0.00%> (-1.48%)	⬇️

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