Move to upstream go-control-plane from fork

[jpeach]

Summary

• In pkg/util/xds/v3/cache.go we have a forked version of go-control-plane's SnapshotCache type. This was forked so that we can use it for non-Envoy xDS resources.
  So that we don't have to maintain the fork we should consider
  • moving to LinearCache, which allows a single arbitrary resource
  • refactoring upstream to allow SnapshotCache to be type oblivious, Add a snapshot interface for caching non-Envoy types envoyproxy/go-control-plane#489
• Move from current fork with fix for deadlock issue

[jpeach]

/cc @lobkovilya

[jpeach]

xref #2004

[jakubdyszkiewicz]

What I think we can do is to use LinearCache with MuxCache. But I'm looking forward to whether we can make Snapshot an interface in upstream go-control-plane

[jpeach]

But I'm looking forward to whether we can make Snapshot an interface in upstream go-control-plane

See envoyproxy/go-control-plane#491.

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[github-actions]

This issue was inactive for 30 days it will be reviewed in the next triage meeting and might be closed.
If you think this issue is still relevant please comment on it promptly or attend the next triage meeting.