Correct context for ClusterConnManager listener (#83035)

[DaveCTurner]

Today ClusterConnectionManager#connectToNode completes its listeners
in the thread context in which the connection completes, which may not
be the correct context if there are multiple concurrent connection
attempts. With this commit we make sure to complete each listener in the
context in which it was passed to the corresponding call to
connectToNode.

Co-authored-by: ievgen.degtiarenko [email protected]

[DaveCTurner]

Failure looks transient:

11:07:27 A problem occurred configuring project ':build-tools'.
11:07:27 > Could not resolve all files for configuration ':build-tools:classpath'.
11:07:27    > Could not download maven-model-3.6.2.jar (org.apache.maven:maven-model:3.6.2)
11:07:27       > Could not get resource 'https://plugins.gradle.org/m2/org/apache/maven/maven-model/3.6.2/maven-model-3.6.2.jar'.
11:07:27          > Could not HEAD 'https://plugins.gradle.org/m2/org/apache/maven/maven-model/3.6.2/maven-model-3.6.2.jar'.
11:07:27             > Read timed out
11:07:27    > Could not download apache-rat-0.11.jar (org.apache.rat:apache-rat:0.11)
11:07:27       > Could not get resource 'https://plugins.gradle.org/m2/org/apache/rat/apache-rat/0.11/apache-rat-0.11.jar'.
11:07:27          > Could not HEAD 'https://plugins.gradle.org/m2/org/apache/rat/apache-rat/0.11/apache-rat-0.11.jar'.
11:07:27             > Read timed out
11:07:27    > Could not download apache-rat-tasks-0.11.jar (org.apache.rat:apache-rat-tasks:0.11)
11:07:27       > Could not get resource 'https://plugins.gradle.org/m2/org/apache/rat/apache-rat-tasks/0.11/apache-rat-tasks-0.11.jar'.
11:07:27          > Could not HEAD 'https://plugins.gradle.org/m2/org/apache/rat/apache-rat-tasks/0.11/apache-rat-tasks-0.11.jar'.
11:07:27             > Read timed out
11:07:27    > Could not download apache-rat-core-0.11.jar (org.apache.rat:apache-rat-core:0.11)
11:07:27       > Could not get resource 'https://plugins.gradle.org/m2/org/apache/rat/apache-rat-core/0.11/apache-rat-core-0.11.jar'.
11:07:27          > Could not HEAD 'https://plugins.gradle.org/m2/org/apache/rat/apache-rat-core/0.11/apache-rat-core-0.11.jar'.
11:07:27             > Read timed out
11:07:27    > Could not download commons-cli-1.2.jar (commons-cli:commons-cli:1.2)
11:07:27       > Could not get resource 'https://plugins.gradle.org/m2/commons-cli/commons-cli/1.2/commons-cli-1.2.jar'.
11:07:27          > Could not HEAD 'https://plugins.gradle.org/m2/commons-cli/commons-cli/1.2/commons-cli-1.2.jar'.
11:07:27             > Read timed out

@elasticmachine please run elasticsearch-ci/packaging-tests-windows-sample