Bump to Strimzi 0.43.0 operator and Kafka operand to 3.8

[matzew]

As per title

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 48.55%. Comparing base (8cd6f05) to head (e12bb3c).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4093   +/-   ##
=======================================
  Coverage   48.55%   48.55%           
=======================================
  Files         244      244           
  Lines       14825    14825           
=======================================
  Hits         7199     7199           
  Misses       6912     6912           
  Partials      714      714           

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[Cali0707]

/lgtm
/retest-required

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Cali0707, matzew

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[knative-prow]

@matzew: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
upgrade-tests_eventing-kafka-broker_main	e12bb3c	link	unknown	/test upgrade-tests
reconciler-tests-namespaced-broker_eventing-kafka-broker_main	e12bb3c	link	unknown	/test reconciler-tests-namespaced-broker

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