fix(ui): MUI theme overlap in YamlSection

[PratikMane0112]

Fixes #2606

In MUI theme mode, the YAML content section in Model Catalog Sources had two issues:

• view expected file format button was unclickable
• text elements overlapped within the form label area

Description

Changes done in

• MUI mode : simplified the FormGroup label to a plain string for correct floating label rendering & moved the "View expected file format" button outside the FormGroup.
• PF mode: unchanged.

How Has This Been Tested?

• modelCatalogSettings suite pass

• manual verification with STYLE_THEME=mui-theme npm run start:dev

  • before :

    

  • after :

    

Merge criteria:

• All the commits have been signed-off (To pass the DCO check)

• The commits have meaningful messages
• Automated tests are provided as part of the PR for major new functionalities; testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work.
• Code changes follow the kubeflow contribution guidelines.
• For first time contributors: Please reach out to the Reviewers to ensure all tests are being run, ensuring the label ok-to-test has been added to the PR.

If you have UI changes

• The developer has added tests or explained why testing cannot be added.
• Included any necessary screenshots or gifs if it was a UI change.
• Verify that UI/UX changes conform the UX guidelines for Kubeflow.

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[PratikMane0112]

cc @manaswinidas, can you please comment ok-to-test, this my first patch & also I am ready to do further changes, if needed :)

[manaswinidas]

/ok-to-test

[Philip-Carneiro]

this is fixed in other PR #2526