Only fetch serving runtime templates with dashboard label

[DaoDaoNoCode]

JIRA: https://issues.redhat.com/browse/RHOAIENG-12799

Description

Added back the label selector for 'opendatahub.io/dashboard': 'true' when fetching the templates.

How Has This Been Tested?

1. Go to the serving runtimes page in the settings
2. Duplicate a serving runtime template
3. Go to the OpenShift console and find that template
4. Remove the label 'opendatahub.io/dashboard': 'true' from the template
5. Refresh the serving runtimes page in the dashboard
6. Make sure the template without the label is not listed

Test Impact

There is no way to test the WebSocket watch API, the only way is to make sure the hook has been called with the selector option, so I updated that.

Request review criteria:

Self checklist (all need to be checked):

• The developer has manually tested the changes and verified that the changes work
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has added tests or explained why testing cannot be added (unit or cypress tests for related changes)

If you have UI changes:

• Included any necessary screenshots or gifs if it was a UI change.
• Included tags to the UX team if it was a UI/UX change.

After the PR is posted & before it merges:

• The developer has tested their solution on a cluster by using the image produced by the PR to main

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.46%. Comparing base (da0aa67) to head (878dd3e).
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3222      +/-   ##
==========================================
- Coverage   85.47%   85.46%   -0.01%     
==========================================
  Files        1279     1279              
  Lines       28161    28161              
  Branches     7525     7525              
==========================================
- Hits        24070    24069       -1     
- Misses       4091     4092       +1     

Files with missing lines	Coverage Δ
frontend/src/api/k8s/templates.ts	100.00% <ø> (ø)

... and 3 files with indirect coverage changes

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[pnaik1]

/lgtm
testing in the cluster, removing the label 'opendatahub.io/dashboard': 'true' from the template, the template is not listed in the serving runtimes page

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Gkrumbach07

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• frontend/OWNERS [Gkrumbach07]

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