[Backport] [2.x] Bump Mockito dependencies

[reta]

Description

Backport of #1711 to 2.x (the mockito deps were updated in #1697 backport proactively)

Issues Resolved

Part of opensearch-project/OpenSearch#10334

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

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0d639f2) 82.61% compared to head (02395f6) 82.60%.

❗ Current head 02395f6 differs from pull request most recent head dec09d4. Consider uploading reports for the commit dec09d4 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x    #1868      +/-   ##
============================================
- Coverage     82.61%   82.60%   -0.01%     
  Complexity     5389     5389              
============================================
  Files           521      521              
  Lines         21706    21700       -6     
  Branches       2211     2211              
============================================
- Hits          17932    17926       -6     
  Misses         2876     2876              
  Partials        898      898              

Flag	Coverage Δ
ml-commons	82.60% <ø> (-0.01%)	⬇️

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