Update defaultChannel and channels for multicluster-engine

[midu16]

For OpenShift 4.22 version the RHACM 2.17 matches with MCE 2.17:

RHACM version 2.17 is released with MCE version 2.17 for cluster management. Note: multicluster engine for Kubernetes operator 2.11 was the immediate previous release. The current version is changed to better reflect MCE's alignment within RHACM 2.17.

Rerefence: https://access.redhat.com/articles/7142376

[openshift-ci]

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[openshift-ci]

Hi @midu16. Thanks for your PR.

I'm waiting for a openshift-kni member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 4e6f6919-20ef-4761-80fa-7083bfe25821

📥 Commits

Reviewing files that changed from the base of the PR and between fcb20f8 and 6d5d4e4.

📒 Files selected for processing (1)

• telco-hub/install/mirror-registry/imageset-config.yaml

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📝 Walkthrough

Walkthrough

The advanced-cluster-management mirror configuration changes its default channel and explicitly mirrored channel from stable-2.12 to stable-2.17.

Changes

Advanced Cluster Management channel update

Layer / File(s)	Summary
Update ACM mirror channel telco-hub/install/mirror-registry/imageset-config.yaml	The advanced-cluster-management configuration now uses stable-2.17 as both its default and mirrored channel.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title matches the main change by describing the channel updates for multicluster-engine, though it omits the RHACM/MCE version context.
Description check	✅ Passed	The description is clearly related to the channel alignment change and the RHACM/MCE version update.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[irinamihai]

/ok-to-test

[abraham2512]

/retest

[midu16]

@abraham2512 / @irinamihai should i do something else for this PR?