Add explanation for --google_default_credentials
Add explanation for --google_default_credentials

bazel supports application default credentials to access GCS bucket too.

Closes #8297.

PiperOrigin-RevId: 249233903

ulfjack/bazel,werkt/bazel,davidzchen/bazel,davidzchen/bazel,dslomov/bazel,cushon/bazel,twitter-forks/bazel,dslomov/bazel,cushon/bazel,davidzchen/bazel,twitter-forks/bazel,perezd/bazel,ButterflyNetwork/bazel,katre/bazel,davidzchen/bazel,katre/bazel,dslomov/bazel-windows,meteorcloudy/bazel,ButterflyNetwork/bazel,bazelbuild/bazel,perezd/bazel,akira-baruah/bazel,cushon/bazel,katre/bazel,aehlig/bazel,ButterflyNetwork/bazel,perezd/bazel,aehlig/bazel,akira-baruah/bazel,katre/bazel,dslomov/bazel,safarmer/bazel,meteorcloudy/bazel,bazelbuild/bazel,perezd/bazel,ulfjack/bazel,twitter-forks/bazel,twitter-forks/bazel,dslomov/bazel-windows,katre/bazel,werkt/bazel,werkt/bazel,perezd/bazel,dslomov/bazel,aehlig/bazel,twitter-forks/bazel,akira-baruah/bazel,meteorcloudy/bazel,davidzchen/bazel,dslomov/bazel,akira-baruah/bazel,twitter-forks/bazel,twitter-forks/bazel,safarmer/bazel,ulfjack/bazel,ulfjack/bazel,katre/bazel,cushon/bazel,davidzchen/bazel,meteorcloudy/bazel,safarmer/bazel,dslomov/bazel-windows,bazelbuild/bazel,aehlig/bazel,akira-baruah/bazel,werkt/bazel,davidzchen/bazel,safarmer/bazel,meteorcloudy/bazel,werkt/bazel,bazelbuild/bazel,meteorcloudy/bazel,safarmer/bazel,dslomov/bazel,safarmer/bazel,werkt/bazel,ulfjack/bazel,dslomov/bazel-windows,ButterflyNetwork/bazel,dslomov/bazel-windows,ButterflyNetwork/bazel,ButterflyNetwork/bazel,perezd/bazel,ulfjack/bazel,meteorcloudy/bazel,dslomov/bazel,aehlig/bazel,perezd/bazel,cushon/bazel,aehlig/bazel,ulfjack/bazel,aehlig/bazel,dslomov/bazel-windows,akira-baruah/bazel,cushon/bazel,bazelbuild/bazel,bazelbuild/bazel