Add clear status message for models with disabled NIM

[LinoyBitan1]

JIRA - https://issues.redhat.com/browse/NVPE-149

Description

This PR ensures a more readable and clear status message for Inference Service models in "pending" or "failed" states when NVIDIA NIM is disabled. Previously, a generic and unclear error message was displayed in such cases.

Before the fix:

• The status message displayed a generic error for models that failed to load when NIM was disabled.
  

After the fix:

• The status message now clearly indicates that the failure or pending status is due to NIM being disabled.
  

How Has This Been Tested?

Tested locally.

Test Impact

1. Install RHOAI 2.17
2. Go to the explore tab then click NVIDIA NIM card
3. Provide a valid API key and click submit
4. Create a new project and new NIM model
5. Disable NIM by changing API key in nvidia-nim-access Secret
6. Open the model list in your project in RHOAI
7. Ensure that the status message reflects the relevant error -NVIDIA NIM is currently not enabled when the model is pending or failed.

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)

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• 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

[openshift-ci]

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[openshift-ci]

Hi @LinoyBitan1. Thanks for your PR.

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[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 1 line in your changes missing coverage. Please review.

Project coverage is 84.64%. Comparing base (6ded983) to head (3850609).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
...end/src/pages/modelServing/screens/global/utils.ts	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3791      +/-   ##
==========================================
- Coverage   84.71%   84.64%   -0.08%     
==========================================
  Files        1512     1515       +3     
  Lines       34956    35107     +151     
  Branches     9786     9818      +32     
==========================================
+ Hits        29613    29716     +103     
- Misses       5343     5391      +48     

Files with missing lines	Coverage Δ
...lServing/screens/global/InferenceServiceStatus.tsx	86.36% <100.00%> (+0.64%)	⬆️
...erving/screens/global/InferenceServiceTableRow.tsx	100.00% <ø> (ø)
...end/src/pages/modelServing/screens/global/utils.ts	97.14% <87.50%> (-2.86%)	⬇️

... and 21 files with indirect coverage changes

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[emilys314]

/ok-to-test