## Why are these changes needed?
When ray spill back, it'll check whether the node exists or not through gcs, so there is a race condition and sometimes raylet crashes due to this.
This PR filter out the node that's not available when select the node.
## Related issue number
#19438
## Why are these changes needed?
The most significant change of the PR is the `GcsPublisher` wrapper added to `src/ray/gcs/pubsub/gcs_pub_sub.h`. It forwards publishing to the underlying `GcsPubSub` (Redis-based) or `pubsub::Publisher` (GCS-based) depending on the migration status, so it allows incremental migration by channel.
- Since it was decided that we want to use typed ID and messages for GCS-based publishing, each member function of `GcsPublisher` accepts a typed message.
Most of the modified files are from migrating publishing logic in GCS to use `GcsPublisher` instead of `GcsPubSub`.
Later on, `GcsPublisher` member functions will be migrated to use GCS-based publishing.
This change should make no functionality difference. If this looks ok, a similar change would be made for subscribers in GCS client.
## Related issue number
## Why are these changes needed?
There are some issues left from previous PRs.
- Put the gcs_actor_scheduler_mock_test back
- Add comment for named actor creation behavior
- Fix the comment for some flags.
## Related issue number
* exp backoff
* up
* format
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* format
* fix
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* format
* adjust ordering
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* Revert "[tune] Cache unstaged placement groups for potential re-use (#18706)"
This reverts commit 2e99fb215f.
* up
* update
* format
* up
* format
* fix
* Revert "Revert "[tune] Cache unstaged placement groups for potential re-use (#18706)""
This reverts commit 93425fdb986059e53699623a0fc8590c062e139b.
* up
* format
* fix lint
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* check
* add test1
* format
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* add test
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* fix
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* add test
* format
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* fix lint
* format
* fix
* format
* fix
* up
* clang-tidy
* fix
* fix script
* test clang compiler
* fix clang-tidy rules
* Fix windows and other issues.
* Fix
* Improve information when running check-git-clang-tidy-output.sh on different OS
* Streaming support metric reporter
* fix lint
* fix bazel format lint
* fix lint
* metric deps lint
* lint
* and comments for runtime reporter
* unordered_map instead
* comments
* fix visibility flag
* deps local .so target
* make stats public visibility
* stats lib in public
* add antgroup team tag
* begin
* build
* add test
* add first test
* add test
* fix build
* lint bazel
* fix build
* fix build
* fix crash
* fix some comment
* revert shared_ptr ObjectLifecycleManager
* fix RemoveGetRequest lost
* no defer
* fix lots of comments
* fix build
* fix data race
* fix comments
* Revert "fix data race"
This reverts commit 8f58e3d70b73af864566e056211ff1b70cab870c.
* refine
* fix mac build
* fix unit test
* fix unit test
* up
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* checkpoint
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* fix
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* add comments
* up
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* add tests
