fix(resource): allow resource to be paused individually

[yyewolf]

This pull request enhances the handling of resource pausing during reconciliation and adds comprehensive end-to-end tests to ensure correct behavior when resources are paused and unpaused. The main changes focus on improving how the pause label prevents resource mutations, and verifying this functionality through new tests.

Pause logic improvements:

• Refactored the pause label check so that resource mutation is skipped within the mutator function passed to CreateOrPatch, rather than skipping the entire reconciliation step. This allows for more granular control and ensures that only the mutation is bypassed when the pause label is present. [1] [2]

Testing enhancements:

• Added a new end-to-end test to pause_tests.go that verifies a ConfigMap is not updated when it has the pause label, and resumes updating once the label is removed. The test checks initial creation, ensures data remains unchanged while paused, and validates correct updates after unpausing.