[backport v2.15.1] Generic OIDC provider: If scopes are mandatory (`openid`, `profile` and `email`) UI shouldn't allow the removal/edit of those scopes

[rancher-ui-project-bot]

This is a backport issue for #15707, automatically created via GitHub Actions workflow initiated by @marcelofukumoto

Original issue body:

related to SURE-10875

Setup

• Rancher version:
• Rancher UI Extensions:
• Browser type & version:

Describe the bug

Generic OIDC provider: If scopes are mandatory (openid, profile and email) UI shouldn't allow the removal/edit of those scopes

To Reproduce

• Go to Generic OIDC provider
• remove one of these three scopes and fill in the rest of the form
• Enabled button is greyed out and no relevant feedback to the user

Result

• Enabled button is greyed out and no relevant feedback to the user

Expected Result

• Users shouldn't be allowed to delete the openid, profile and email scopes since they are mandatory

Screenshots

Additional context