Fix cves for pcre2 and libxml2 (#4116)

[bjee19]

Cherry-pick #4116. Update pcre2 and libxml2 in our base nginx docker image.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.50%. Comparing base (1f4392a) to head (f36dba8).
⚠️ Report is 1 commits behind head on release-2.2.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-2.2    #4117      +/-   ##
===============================================
+ Coverage        86.47%   86.50%   +0.03%     
===============================================
  Files              131      131              
  Lines            17796    17796              
  Branches            74       74              
===============================================
+ Hits             15389    15395       +6     
+ Misses            2205     2201       -4     
+ Partials           202      200       -2     

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