Add forwardRef to react-admin buttons to support tooltips

[WiXSL]

Implements #10223

Additional Checks

• The PR targets master for a bugfix or a documentation fix, or next for a feature
• The PR includes unit tests (if not possible, describe why)
• The PR includes one or several stories (if not possible, describe why)
• The documentation is up to date

[WiXSL]

• Note on type changes:

Some of the buttons render a React Router Link (which becomes an <a>), while others render a real <button>.
I typed the refs accordingly:
CreateButton, EditButton, ShowButton, ListButton, CloneButton use component={Link} → ref is HTMLAnchorElement.
The rest render native buttons → ref is HTMLButtonElement
These changes avoid the TS errors of the first commit

• Notes on test/stories:

I've only added one story and test for CreateButton since the changes are the same for every button.
If you want the same for every other one let me know