Fix controlled radios, maybe for real this time (#27443)

Fixes #26876 for real?

In 18.2.0 (last stable), we set .checked unconditionally:


https://github.com/facebook/react/blob/v18.2.0/packages/react-dom/src/client/ReactDOMInput.js#L129-L135

This is important because if we are updating two radios' checkedness
from (false, true) to (true, false), we need to make sure that
input2.checked is explicitly set to false, even though setting
`input1.checked = true` already unchecks input2.

I think this fix is not complete because there is no guarantee that all
the inputs rerender at the same time? Hence the TODO. But in practice
they usually would and I _think_ this is comparable to what we had
before.

Also treating function and symbol as false like we used to and like we
do on initial mount.