[fix][sec] Dismiss warning about MD5 since it's sufficient for these use cases

[lhotari]

Motivation

• CodeQL warns about using MD5 in 2 locations in the Pulsar code base

Modifications

• Dismiss warning about MD5 since it's sufficient for these use cases

Additional context

• Dismissing warnings is mentioned in CodeQL changelog.
• CodeQL Java support's test case contains examples of supported syntax.

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.64%. Comparing base (bbc6224) to head (75a112a).
Report is 58 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #22282      +/-   ##
============================================
+ Coverage     73.57%   73.64%   +0.07%     
+ Complexity    32624    32256     -368     
============================================
  Files          1877     1887      +10     
  Lines        139502   139436      -66     
  Branches      15299    15292       -7     
============================================
+ Hits         102638   102691      +53     
+ Misses        28908    28787     -121     
- Partials       7956     7958       +2     

Flag	Coverage Δ
inttests	26.87% <ø> (+2.29%)	⬆️
systests	24.44% <ø> (+0.12%)	⬆️
unittests	72.91% <ø> (+0.07%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...che/pulsar/client/impl/crypto/MessageCryptoBc.java	68.12% <ø> (ø)
...java/org/apache/pulsar/common/nar/NarUnpacker.java	80.32% <ø> (+1.63%)	⬆️

... and 102 files with indirect coverage changes