* Faster driver build strip-and-compress step by not loading Metabase core

* New cache key for FE deps

* Cache built drivers & local Maven installation of metabase-core

* Only cache the built driver JARs

* Cache built frontend

* Change driver cache key

* Try updating a specific driver [ci snowflake]

* Try updating a different driver [ci redshift] [ci snowflake]

* Need to cache driver checksums as well [ci snowflake] [ci redshift]

* Tweak what's cached for drivers (again)