feat: Add label-based object filtering functionality

[a-hilaly]

Introduces label selectors to filter which objects controllers watch, reducing resource usage
and improving performance in large clusters by allowing controllers to focus only on objects
with specific labels instead of processing all resources.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[ack-prow]

@a-hilaly: 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
verify-attribution	69d450c	link	false	/test verify-attribution
sagemaker-controller-test	69d450c	link	true	/test sagemaker-controller-test

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[rushmash91]

thank you @itaiatu and @a-hilaly !!
/lgtm

[ack-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: a-hilaly, rushmash91

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