[0.13.x] Refactor test settings and access rights

[github-actions[bot]]

Backport: https://github.com/Hyperfoil/Horreum/pull/1720

Fixes Issue

Fixes https://github.com/Hyperfoil/Horreum/issues/1674

Changes proposed

In order to properly fix the issue, I had to slightly refactor the UI for Test settings and access rights.

This is the list of changes I did:

• [x] Moved the Access rights tab into the Settings one, this way you can set the proper permissions during the Test creation
• [x] Kept Test Tokens creation/deletion in a separate tab (which will replace the Access one, now called Tokens)
• [x] Refactored the Tokens management to be consistent with other UI screens
• [x] Moreover, once tokens are update the changes are automatically reflected in the UI without any reload page
• [x] The new Tokens tab is NOT visible during Test creation as the backend API requires an existing Test to properly add/delete tokens.

With this new UI, users are able to create a new Test with custom permissions, either Public or Protected (which is something not working before)

Here a brief summary of UI changes in the form of before/after:

Settings

Before:

After:

Tokens

Before:

After:

Check List (Check all the applicable boxes)

• [x] My code follows the code style of this project.
• [ ] My change requires changes to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] All new and existing tests passed.