Use consistent naming for remaining initialisms in internal/tunnel
requested to merge gitlab-community/cluster-integration/gitlab-agent:fix-initialisms-in-internal-tunnel-3 into master
Improve naming for initialisms (#468 (closed)) in internal/tunnel. The MR is a follow-up of !1314 (merged) and includes the last changes for internal/tunnel:
- Rename agentIdFromMeta to agentIDFromMeta
- Rename privateApiServerDesc to privateAPIServerDesc
- Rename privateApiServer to privateAPIServer
- Rename privateApiServerListener to privateAPIServerListener
- Rename pipeFromStreamToKas to pipeFromStreamToKAS
- Rename statusFromKasStream to statusFromKASStream
- Rename tests
- Rename kasUrlPipe to kasURLPipe
- Rename TestTrailerAfterRecvMsgEof to TestTrailerAfterRecvMsgEOF
- Rename tests for KASURLsByAgentID
- Rename ownPrivateApiUrl to ownPrivateAPIURL
- Rename selfUrl to selfURL