* build: cache the out directory for exact deps hash matches

* chore: generate a target based depshash discriminator

* fix: hash on gn args

* build: share logic on the mac builds

* build: ensure that the mksnapshot binary is built before stripping before zipping

* build: attach the workspace on macOS

* build: optimize the macOS checkout path for testing

* build: fix mksnapshot zip generation

* build: make the mac src cache restore work

* build: v2 out cache

* build: macOS cache restore is just stupidly slow

* build: strip more binaries

* build: attach the out cache to the workspace for macOS builds

* build: allow linux boxes to restore darwin out caches

* build: cat the deps hash target file

* build: ensure that the deps target hash matches on the linux box

* build: do not use host arch in target key

* build: force undefined in the target hash file

* build: only restore out cache when it isn't in t...