Description of problem:

There is no UI validation in place for the "URL" field from GitLab IDP page from "Access control" section of a cluster. The user was indicated validation error on the URL when submitting a wrong value as it is handled from backend. We need to put a validation rule for the same field in UI as well.

How reproducible:

always

Steps to Reproduce:

1. Open OCM UI staging 
2. Open a ready OSD/ROSA cluster.
3. Go to "Access control" tab > Identity provider section
4. Select "GitLab" IDP.
5. In "Gitlab" IDP form, enter the invalid url to URL field and see the behavior.

Actual results:

No validation in place for the  URL field from UI side. 
Note: Validation error thrown from back-end when user submit the definition to back-end,

Expected results:

User should be notified by validation error for "URL" field when wrong values are entered.User shouldn't allow to submit the data to back-end with invalid values.