v23: Add test.V23InitWithNamespace
v23: Add test.V23InitWithNamespace

Many tests use endpoints instead of names out of laziness.  This makes
it nearly zero cost to use names which makes the test code more realistic
and cleaner.

This introduces new dependencies for external tests in other repos, so
several .godepcop files were modified.

MultiPart: 1/3

Change-Id: I1a4a778b5b1380f4f33c25aa4fe24f4f793d66b2

vanadium/go.v23,vanadium/go.v23,vanadium/go.v23