fix: ResourceGroup status updates missed

[karlkfi]

The ResourceGroup "root" controller has been filtering events in the following cases:

1. When the status is disabled
2. When the ResourceGroup Reconciling condition was True
3. When the kstatus was out of date according to the actuation status

These are all unnecessary to filter, because:

1. Status disablement is already checked in the reconcile method
2. Filtering events when Reconciling=True causes a bug where a long-running reconcile method might prevent concurrent status updates to managed resources from being reflected in the ResourceGroup status.
3. The reconcile method already computes the kstatus, so computing it in the watch event filter is redundant.

This change removes the ResourceGroupPredicate entirely to remove these redundant and erroneous event filters.

Dependencies:

• fix: ResourceGroup controller stuck retrying #1573

[google-oss-prow]

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[google-oss-prow]

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

Test name	Commit	Details	Required	Rerun command
kpt-config-sync-presubmit-e2e-multi-repo-test-group1	09f3461	link	true	/test kpt-config-sync-presubmit-e2e-multi-repo-test-group1

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