Enable debug_prefix_map_pwd_is_dot feature by default on macOS
Enable debug_prefix_map_pwd_is_dot feature by default on macOS

This feature improves hermeticity of binaries, and shouldn't have impact
on debugging.

RELNOTES: Enable debug_prefix_map_pwd_is_dot feature by default on macOS, this passes `-fdebug-prefix-map=$PWD=.` for every compile to remove absolute paths from debug info.

Closes #12345.

PiperOrigin-RevId: 339420417

bazelbuild/bazel,ButterflyNetwork/bazel,twitter-forks/bazel,cushon/bazel,ButterflyNetwork/bazel,safarmer/bazel,twitter-forks/bazel,katre/bazel,safarmer/bazel,ButterflyNetwork/bazel,meteorcloudy/bazel,bazelbuild/bazel,bazelbuild/bazel,cushon/bazel,safarmer/bazel,katre/bazel,cushon/bazel,perezd/bazel,twitter-forks/bazel,perezd/bazel,bazelbuild/bazel,meteorcloudy/bazel,safarmer/bazel,safarmer/bazel,meteorcloudy/bazel,cushon/bazel,meteorcloudy/bazel,perezd/bazel,safarmer/bazel,ButterflyNetwork/bazel,twitter-forks/bazel,katre/bazel,katre/bazel,bazelbuild/bazel,cushon/bazel,perezd/bazel,meteorcloudy/bazel,perezd/bazel,meteorcloudy/bazel,meteorcloudy/bazel,twitter-forks/bazel,perezd/bazel,katre/bazel,cushon/bazel,twitter-forks/bazel,katre/bazel,ButterflyNetwork/bazel,ButterflyNetwork/bazel,perezd/bazel,bazelbuild/bazel,twitter-forks/bazel