Replace withTranslation HOC with hooks and test against actual i18n'd values

[cbeer]

No description provided.

[marlo-longley]

This is awesome so much cleaner, thank you Chris !!

1. With Update search components to functions. #3999 merged you can rebase the Search components which will limit their changes just to the translation stuff (and not the functional conversion)
2. I guess we will need to rewrite the Jest stuff for Vitest but it doesn't look that bad.

[cbeer]

Yes, I think those are the next steps, and I'm hopeful this'll merge nicely into the vite branch (and if it doesn't, it should just be removing lines of code...)

[marlo-longley]

Needs rebase but looks good to me.