Change server module to ESM from CommonJS

[calebcartwright]

Several core dependencies within our tree have cut over from CommonJS to ESM which is blocking updates (#6419).

This was discussed at the last ops meeting and consensus seems to be that we'll need to completely move the server over to ESM sooner rather than later

[PyvesB]

Have started looking into this in a bit more details. Not sure how far I'll get, but hopefully I'll have something to share soon-ish.

[paulmelnikow]

🚀 🎉

[chris48s]

Now that the CommonJS to ESM migration is done there is a follow up job of upgrading the dependencies we have been ignoring. Do we have a list of what dependency upgrades this unblocks aside from escape-string-regexp ?