* add fixed test vectors for `z_getsubtreesbyindex`
* change to snapshots
* add test to docker
* remove assert lines from snapshots
* add more tests
* change test description
* change test name
* run both tests together
* wait for state version update in test
* Run one test at a time to avoid state locking issues
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Co-authored-by: teor <teor@riseup.net>
Alfredo Garcia