Danbar/e2e rolling update 10

[danbar2]

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[Copilot]

Pull request overview

This PR enhances the rolling update functionality and fixes test infrastructure for e2e tests. The main focus is on fixing Test_RU10 to properly verify delete-first rolling update behavior when resources are insufficient, and improving Docker image handling in the test setup.

Changes:

• Fixed logic in mutateUpdatedReplica to correctly track updated replicas when a rolling update completes
• Updated Test_RU10 to verify delete-first strategy behavior with cordoned nodes
• Refactored Docker image pulling logic to avoid duplication and add authentication support

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
operator/internal/controller/podclique/reconcilestatus.go	Added handling for the window between rolling update completion and hash update
operator/e2e/tests/rolling_updates_test.go	Uncommented and fixed Test_RU9 and Test_RU10, updated timeouts and verification logic
operator/e2e/setup/shared_cluster.go	Added Docker authentication support and extracted common image pull logic
operator/e2e/setup/k8s_clusters.go	Refactored to use common image pull helper function

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mistake

[gflarity]

Left some comments around the utils, but looks like this also addresses
#315. Nice!

[gflarity]

Looking good, one question and one comment.

[sanjaychatterjee]

@unmarshall please review this fix for rolling updates