Update Sonatype release link in build_release.py
[TEST] fixed scriptedMetricTests

The tests were failing because there was a shard which didn't get any documents and the tests assumed all shards had documents. This commit fixes this assumption
[docs] fix typo in getting-started

Closes #8354
Discovery: a more lenient wait joinThread when stopping

When a node stops, we cancel any ongoing join process. With #8327, we improved this logic and wait for it to complete before shutting down the node. In our tests we typically shutdown an entire cluster at once, which makes it very likely for nodes to be joining while shutting down. This introduces a race condition where the joinThread.interrupt can happen before the thread starts waiting on pings which causes shutdown logic to be slow. This commits improves by repeatedly trying to stop the thread in smaller waits.

Another side effect of the change is that we are now more likely to ping ourselves while shutting down, we results in an ugly warn level log. We now log all remote exception during pings at a debug level.

Closes #8359
Revert "Discovery: a more lenient wait joinThread when stopping"

This reverts commit 83d9dab79882700fb21cb496282bafdb1d28a5ca.
[CORE] Cut over to Path API for file deletion

Today we use the File API for file deletion as well as recursive
directory deletions. This API returns a boolean if operations
are successful while hiding the actual reason why they failed.
The Path API throws and actual exception that might provide better
insights and debug information.

Closes #8366