`Publish Review` buttons should indicate why they are disabled (#23598)
Adding tooltip on "Approve" and "Review Changes" buttons. is try to do
by them self on their PR.
Resolves https://github.com/go-gitea/gitea/issues/23547
`Approve` tootip text :- "Pull request authors can’t approve their own
pull request"
`Request Changes` tooltip text:- "Pull request authors can’t request
changes on their own pull request"
Before
https://user-images.githubusercontent.com/115237/225984020-306c048f-cb9b-4dee-8929-1c74c331518b.png
After
<img width="841" alt="image"
src="https://user-images.githubusercontent.com/80308335/226445845-b5f6f6c9-f0dc-4934-a282-3b8be06417a8.png">