The "Delete Repository" button should be disabled, just like any other admin button in the page,
if you cannot edit the repository, so to do not cause anxiety situations to users without
editing permissions.

Moreover, probably, if you still want to click that disabled button,
you should still be allowed to see the super-nice related information message,
just because it's super-lovely, super-informative and it does nothing wrong.

Closes T15964

Be normal user. See the button finally disabled. Click it, you finally see its related info popup instead "You shall not pass",
so you unlock extra documentation to read.

Be admin user. See the button still enabled. Click it, you still can see the info popup.