fix(operator): idempotent sa image pull secrets

[enoodle]

Description

Fixes a problem of high CPU usage of the operator pod in Openshift due to repeatedly removing an image pull secret that openshift wants to add to the reservation pods service account

Related Issues

Fixes #

Checklist

Note: Ensure your PR title follows the Conventional Commits format (e.g., feat(scheduler): add new feature)

• Self-reviewed
• Added/updated tests (if needed)
• Updated CHANGELOG.md (if needed)
• Updated documentation (if needed)

Breaking Changes

Additional Notes

[github-actions]

Merging this branch will decrease overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/NVIDIA/KAI-scheduler/pkg/operator/operands/binder	68.18% (-1.43%)	👎

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/NVIDIA/KAI-scheduler/pkg/operator/operands/binder/resources.go	67.39% (-1.66%)	92 (+8)	62 (+4)	30 (+4)	👎

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

[github-actions]

Merging this branch will increase overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/NVIDIA/KAI-scheduler/pkg/operator/operands/binder	75.68% (+9.01%)	👍

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/NVIDIA/KAI-scheduler/pkg/operator/operands/binder/resources.go	77.17% (+10.88%)	92 (+3)	71 (+12)	21 (-9)	🎉

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/NVIDIA/KAI-scheduler/pkg/operator/operands/binder/binder_test.go

[github-actions]

Merging this branch will increase overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/NVIDIA/KAI-scheduler/pkg/operator/operands/binder	73.28% (+6.61%)	👍

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/NVIDIA/KAI-scheduler/pkg/operator/operands/binder/resources.go	74.23% (+7.93%)	97 (+8)	72 (+13)	25 (-5)	👍

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/NVIDIA/KAI-scheduler/pkg/operator/operands/binder/binder_test.go