* Storage compat. tests all supported versions
* v1.15.0 creates problems
* less parallelism to not blow the disk
* Add xdist group (#7568)
* Add session fixture and xdist group
* Increase number of workers back to 4
* Revert caching
* Remove folders with docker_client
* Fix --dist=loadgroup
* Disable v1.15.0
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Co-authored-by: tellet-q <166374656+tellet-q@users.noreply.github.com>
