Adding connect auth feature. Proxy-Authorization header is being inserted when user creds are present in uri

Modify image names to match the one in dockerhub.

Add a test of repeatedly calling grpc_init then grpc_shutdown

Add myself as owner of files in several directories

Sanitizing repo.

Few fixes for mkowners.py.

Import mutations.

Don't set the channel's state to TRANSIENT_FAILURE if we updated the LB policy.

-) Paths should all be absolute to /
-) Computing the intersection of two globs should happen with the
full path in there, not just the directory's glob.

Replace InitBenchmark with InitTest. Remove qps_test.cc

Add more run_tests_matrix.py labels to allow better sharding.

Add test tree owners for C/C++

Change ci script permission and pull from dockerhub

Use ** for OWNERS files for trees

The Tracers Become Self Aware

Partial Revert of https://github.com/grpc/grpc/pull/10743

Strawman OWNERS --> CODEOWNERS script

Increase timeout for builing ruby artifact