Clear the mock transport rule in testAbortSnapshotWhileRemovingNode
after releasing the single update_snapshot_status request we
coordinate on, so any further requests are handled normally and
complete before teardown. This prevents the test from failing in
assertAfterTest() with "All incoming requests on node [X] should
have finished".

Closes elastic#142805

* Fix testAbortSnapshotWhileRemovingNode

Clear the mock transport rule in testAbortSnapshotWhileRemovingNode
after releasing the single update_snapshot_status request we
coordinate on, so any further requests are handled normally and
complete before teardown. This prevents the test from failing in
assertAfterTest() with "All incoming requests on node [X] should
have finished".

Closes elastic#142805

* Update comment

* Remove second masterTransportService.clearAllRules();

* Use two CountDownLatches

* Add extra masterTransportService.clearAllRules();

* [CI] Auto commit changes from spotless

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Co-authored-by: elasticsearchmachine <infra-root+elasticsearchmachine@elastic.co>
(cherry picked from commit c8d36f0)