[Backport release/3.1.x] fix: do not require namespaces when parsing errors about cluster scoped resources (#5764)

[pmalek]

What this PR does / why we need it:

Backports #5764 to release/3.1.x

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 2 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (release/3.1.x@a69511f). Click here to learn what that means.

Files	Patch %	Lines
...al/dataplane/sendconfig/inmemory_error_handling.go	60.0%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##             release/3.1.x   #5789   +/-   ##
===============================================
  Coverage                 ?   71.7%           
===============================================
  Files                    ?     176           
  Lines                    ?   18304           
  Branches                 ?       0           
===============================================
  Hits                     ?   13139           
  Misses                   ?    4200           
  Partials                 ?     965           

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