This noticeably improves performance in the admin panel, for example
when there are multiple richtext editors on one page (& likely
performance in other areas too, though I mainly tested rich text).
The babel plugin currently only optimizes files with a 'use client'
directive at the top - thus we have to make sure to add use client
wherever possible, even if it's imported by a parent client component.
There's one single component that broke when it was compiled using the
React compiler (it stopped being reactive and failed one of our admin
e2e tests):
150808f608
opting out of it completely fixed that issue
Fixes https://github.com/payloadcms/payload/issues/7366
