This speeds up small builds as we will still persist the credential
cache and it will speed up all builds as we will keep the deps cache
and compiler info cache.
Bug: b/278498980
Change-Id: I2fe26395a7493c461860b34ef3f109b2147abb5e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4454889
Reviewed-by: Junji Watanabe <jwata@google.com>
Reviewed-by: Gavin Mak <gavinmak@google.com>
Commit-Queue: Ben Segall <bentekkie@google.com>
