fix(kuma-cp): make store changes processing more reliable (backport of #6728)

[kumahq]

Automatic cherry-pick of #6728 for branch release-2.0

Generated by action

cherry-picked commit c0953ae
⚠️ ⚠️ ⚠️ Conflicts happened when cherry-picking! ⚠️ ⚠️ ⚠️

On branch release-2.0
Your branch is up to date with 'origin/release-2.0'.

You are currently cherry-picking commit c0953aefb.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   pkg/events/eventbus.go
	modified:   pkg/events/interfaces.go
	modified:   pkg/insights/resyncer.go
	modified:   pkg/insights/test/test_event_reader.go

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   pkg/kds/global/components.go
	both modified:   pkg/plugins/common/postgres/listener.go
	deleted by us:   pkg/plugins/common/postgres/pgx_listener.go
	deleted by us:   pkg/plugins/common/postgres/pq_listener.go
	both modified:   pkg/plugins/resources/postgres/events/listener.go
	deleted by us:   pkg/plugins/resources/postgres/listener_test.go