…lash options (#38666)

* initial wip

* prefix all the things

* lambda handler stripping path prefix

* test: adjust e2e setup to also run variant with path prefix and no trailing slashes

* chore: use queue for file moving to limit concurrency

* tmp: don't clean up deploys while debugging things

* test: added variant variables to deploy title

* fix TS

* fix unit tests

* try different cypress group

* try different cypress group2

* maybe fix passing cypress env?

* fix ssr path_prefix

* keep 404/500 status pages in original place

* fix typo

* fix assertion?

* streamline file moving logic

* cache (and restore) publishdir locally too

* add pretty-url unit tests

* handle dynamic paths when generating pretty url file names

* update intercepting glob to handle path prefix

* update intercepting glob to handle path prefix 2

* restore automatic deploys deletion

* test: jest ensure we mount files that we test filepaths for

* handle path prefix in header rules

* drop debug helpers

* first check if local

* drop debug log

* handle external redirects when pathPrefix is used. Thanks @techfg

* make placeholder syntax consistent

* update comment

* move dynamic route path normalization to its own function

(cherry picked from commit 63e57cf)