Renaming ros2rag.{base,tests} to ragconnect.{base,tests}.

- rename nonterminal (M)Ros2Rag to (M)RagConnect, and attribute ros2rag to ragconnect
- rename starter to safety
- make receiverstub, receiverstub not depend on safety
- make tests not depend on common (copied proto files)
2 jobs for 35-cleanup in 4 minutes and 13 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #16153
build

00:01:31

 
  Test
passed #16154
test

00:02:42