chore: Get rid of pluginRegistryURL

[tolusha]

What does this PR do?

Stop reading the list of devfiles from the internal devfile registry.

What issues does this PR fix or reference?

eclipse-che/che#23026

Is it tested? How?

N/A

Release Notes

Stop reading the list of devfiles from the internal devfile registry.

Docs PR

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: tolusha

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[che-bot]

Click here to review and test in web IDE:

[github-actions]

Docker image build succeeded: quay.io/eclipse/che-dashboard:pr-1158

kubectl patch command

kubectl patch -n eclipse-che "checluster/eclipse-che" --type=json -p="[{"op": "replace", "path": "/spec/components/dashboard/deployment", "value": {containers: [{image: "quay.io/eclipse/che-dashboard:pr-1158", name: che-dashboard}]}}]"

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.16%. Comparing base (f3a22d3) to head (28966f9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1158      +/-   ##
==========================================
- Coverage   89.47%   89.16%   -0.32%     
==========================================
  Files         417      417              
  Lines       42747    42711      -36     
  Branches     2878     2860      -18     
==========================================
- Hits        38250    38083     -167     
- Misses       4467     4596     +129     
- Partials       30       32       +2     

☔ View full report in Codecov by Sentry.
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[devstudio-release]

Build 3.16 :: dashboard_3.x/519: Console, Changes, Git Data

[devstudio-release]

Build 3.16 :: sync-to-downstream_3.x/7369: Console, Changes, Git Data

[devstudio-release]

Build 3.16 :: get-sources-rhpkg-container-build_3.x/7354: Console, Changes, Git Data

[devstudio-release]

Build 3.16 :: push-latest-container-to-quay_3.x/4846: Console, Changes, Git Data

[devstudio-release]

Build 3.16 :: get-sources-rhpkg-container-build_3.x/7354:

dashboard : 3.x :: Build 63174838 : quay.io/devspaces/dashboard-rhel8:3.16-16
SUCCESS; copied to quay; /DS_CI/push-latest-container-to-quay_3.x/4846 triggered

[devstudio-release]

Build 3.16 :: dashboard_3.x/519:

Upstream sync done; /DS_CI/sync-to-downstream_3.x/7369 triggered

[devstudio-release]

Build 3.16 :: update-digests_3.x/7251: Console, Changes, Git Data

[devstudio-release]

Build 3.16 :: update-digests_3.x/7251:

No new images detected: nothing to do!