add backend route for storage class metadata

[Gkrumbach07]

closes: https://issues.redhat.com/browse/RHOAIENG-11855

Description

adds backend route /api/storage-class/{name}/metadata and a frontend service function to call it

How Has This Been Tested?

backend -- no tests

Test Impact

none

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[DaoDaoNoCode]

The function looks good to me. Just need to fix the lint to avoid duplicated import paths.
One quick question: Should we change the endpoint name and the function name here? Looks like the function is trying to update the SC annotation only, but not the whole metadata, should we still call them /:storageClassName/metadata and updateStorageClassMetadata?

[Gkrumbach07]

/retest Test

[openshift-ci]

@Gkrumbach07: The /retest command does not accept any targets.
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In response to this:

/retest Test

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[Gkrumbach07]

/retest failed

[openshift-ci]

@Gkrumbach07: The /retest command does not accept any targets.
The following commands are available to trigger required jobs:

• /test images
• /test odh-dashboard-pr-image-mirror

Use /test all to run all jobs.

In response to this:

/retest failed

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[DaoDaoNoCode]

/lgtm

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 80.81%. Comparing base (5e854fe) to head (cafdf34).
Report is 8 commits behind head on main.

Files	Patch %	Lines
frontend/src/services/StorageClassService.ts	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3127      +/-   ##
==========================================
- Coverage   80.88%   80.81%   -0.08%     
==========================================
  Files        1239     1241       +2     
  Lines       26895    26960      +65     
  Branches     7041     7079      +38     
==========================================
+ Hits        21755    21788      +33     
- Misses       5140     5172      +32     

Files	Coverage Δ
frontend/src/services/StorageClassService.ts	0.00% <0.00%> (ø)

... and 26 files with indirect coverage changes

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[Gkrumbach07]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: DaoDaoNoCode, Gkrumbach07, jpuzz0

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