Fix: use priority queue in work applier [DO NOT MERGE, see the notes]

[michaelawyu]

Description of your changes

This PR fixes a variety of issues in the current option that enables usage of priority queue in the work applier, specifically:

• priority queue is not registered with the controller
• double enqueueing
• priority settings are not applied for enqueued items
• missing support for reportDiff mode
• incorrent priority assigment

I have:

• Run make reviewable to ensure this PR is ready for review.

How has this code been tested

N/A; see the notes in the PR.

Special notes for your reviewer

DO NOT MERGE; tests are expected to fail. See the notes in the PR for additional information.

[michaelawyu]

At this moment the PR is expected to fail; a potential issue with the priority queue implementation might be blocking our capability to shutdown gracefullly, and consequently the tests might not exit properly.

[michaelawyu]

See also: kubernetes-sigs/controller-runtime#3239 -> will wait until the controller runtime team responds.

[michaelawyu]

This PR also bumps the versions of a number of controller-runtime and related deps to verify the behavior of latest code -> this will be properly handled (as a separate PR) depending on the issue resolution progress.

[michaelawyu]

Progress update (Sep 2, 2025) -> controller-runtime has cut a release (v0.22.0) that features the priority queue fix; however it requires K8s v1.34 API libs. KubeFleet is still currently on v1.32 libs. This PR is on hold until we catches up with v1.34, or controller runtime cuts v0.20.x/v0.21.x that we could use.