Add cypress tests to MR secure DB section

[ppadti]

followup PR to #3623 and #3618

Description

This PR aims to add cypress test for MR secureDB section and address few bugs mentioned here

How Has This Been Tested?

Test Impact

1. Run the cypress tests
2. Also test these scenarios:

• When fetching certificate names fail, Create model registry button should be disabled
• PEM upload file under "Upload new certificate" section is readOnly
• when the first radio option is disabled the form will switch to second option. And when both first and second options are disabled the form selects the third option.

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 85.40%. Comparing base (c4dfc57) to head (b663ff1).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3631      +/-   ##
==========================================
+ Coverage   85.14%   85.40%   +0.26%     
==========================================
  Files        1406     1406              
  Lines       32298    32313      +15     
  Branches     9060     9067       +7     
==========================================
+ Hits        27499    27596      +97     
+ Misses       4799     4717      -82     

Files with missing lines	Coverage Δ
.../modelRegistrySettings/CreateMRSecureDBSection.tsx	96.62% <100.00%> (+37.05%)	⬆️
...nd/src/pages/modelRegistrySettings/CreateModal.tsx	94.81% <100.00%> (+13.86%)	⬆️
.../src/pages/modelRegistrySettings/PemFileUpload.tsx	80.76% <ø> (+76.92%)	⬆️
frontend/src/pages/modelRegistrySettings/utils.ts	100.00% <100.00%> (+53.84%)	⬆️

... and 6 files with indirect coverage changes

---

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[manaswinidas]

/lgtm

The tests for scenarios discussed are covered

[manaswinidas]

This may require unit tests but codecov didn't catch this.. so we can maybe ignore the unit tests.. the cypress tests cover this scenario.

[mturley]

LGTM, thanks guys!

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mturley

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