fix: CP-9166 add tooltip and disabled button

[vvava]

Description

We want to prevent the user clicks the save button if there is an error in the form and indicate that somewhere.

Changes

The Save button is disabled until the form is valid and there is a tooltip on that to indicate there is some errors in the form.

Testing

Go to Add custom network -> try the form out with correct and wrong values.

Screenshots:

Screen.Recording.2024-09-16.at.18.17.52.mov

Checklist for the author

Tick each of them when done or if not applicable.

• I've covered new/modified business logic with Jest test cases.
• I've tested the changes myself before sending it to code review and QA.