)

We can't detect whether or not we are in serverless during default
value setup because we don't have node settings at this point.  This
removes all serverless/stateful detection logic from here, as the
various different index structure changes made during development
were never released and we can use some much simpler checks.

* Revert "Remove BWC shim for a broken commit"

This reverts commit 5cc9804.

* Fix indexversion range check on hostname skippers

And move tsdb bwc tests to x-pack/logsdb (#139671)