refactor(stream): do not broadcast actor info in shared context

[wenym1]

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Highest Release Version: 2.3

What's changed and what's your intention?

Previously we broadcast the ActorInfo of globally all running actors to the SharedContext of each CN, so that the DispatchExecutor and MergeExecutor can get the host of downstream or upstream actors to establish the exchange connection.

In #21256, we already unified remote and local output so that the DispatchExecutor won't need the ActorInfo of downstream actor. In this PR, instead of only providing with upstream actor_ids, we will change to provide the upstream ActorInfo directly for MergeExecutor, either in build actor info, or MergeUpdate, so that MergeExecutor also won't need to get ActorInfo from SharedContext, and in the end, we don't have to broadcast and maintain the global list of ActorInfo anymore.

Checklist

• I have written necessary rustdoc comments.
• I have added necessary unit tests and integration tests.
• I have added test labels as necessary.
• I have added fuzzing tests or opened an issue to track them.
• My PR contains breaking changes.
• My PR changes performance-critical code, so I will run (micro) benchmarks and present the results.
• My PR contains critical fixes that are necessary to be merged into the latest release.

Documentation

• My PR needs documentation updates.

Release note

[wenym1]

• feat(stream): actor create exchange via channel #21299
• refactor(stream): do not broadcast actor info in shared context #21258 👈 (View in Graphite)
• refactor(stream): store shared context in local barrier manager #21257
• refactor(stream): unify remote and local output #21256
• main

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[yezizp2012]

lgtm