dillon1000/react

Don't update textarea defaultValue and input checked unnecessarily (#26580)

In #26573 I changed it so that textareas get their defaultValue reset if
you don't specify one.

However, the way that was implemented, it always set it for any update
even if it hasn't changed.

We have a test for that, but that test only works if no properties
update at all so that no update was scheduled. This fixes the test so
that it updates some unrelated prop.

I also found a test for `checked` that needed a similar fix.

Interestingly, we don't do this deduping for `defaultValue` or
`defaultChecked` on inputs and there's no test for that.