feat: log an error when configuration fails to get applied and KongConfigurationApplyFailed is emitted

[pmalek]

What this PR does / why we need it:

This PR will make KIC emit error logs for each error that is emitted as KongConfigurationApplyFailed event to help users discover errors in their configuration.

Example:

2024-03-28T11:09:33+01:00	error	recording a Warning event for object	{"name": "alice1", "namespace": "default", "kind": "KongConsumer", "apiVersion": "configuration.konghq.com/v1", "reason": "KongConfigurationApplyFailed", "message": "invalid consumer:: uniqueness violation: 'consumers' entity with username set to 'alice' already declared", "error": "object failed to apply"}

Which issue this PR fixes:

Part of #5431

Special notes for your reviewer:

PR Readiness Checklist:

Complete these before marking the PR as ready to review:

• the CHANGELOG.md release notes have been updated to reflect any significant (and particularly user-facing) changes introduced by this PR

[programmer04]

It'd be useful. Btw. problem with an error log reported in #5431 is a problem with Kong Gateway - it doesn't send a response in the expected format. Several similar issues have been reported to them

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.4%. Comparing base (09f1e55) to head (89ea50a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #5763   +/-   ##
=====================================
  Coverage   73.4%   73.4%           
=====================================
  Files        175     175           
  Lines      18147   18158   +11     
=====================================
+ Hits       13321   13342   +21     
+ Misses      3851    3844    -7     
+ Partials     975     972    -3     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[pmalek]

problem with an error log reported in #5431 is a problem with Kong Gateway - it doesn't send a response in the expected format.

👍

#5762 will cover logging the errors that are not in the expected format