Enable timeseries tests, differently

[Swatinem]

Rather than messing with ENV in docker, this uses the test-global config.yml to enable timeseries tests, and switches to a lighter-weight timescale docker image.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.69%. Comparing base (a61ed97) to head (8a936eb).
Report is 2 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1120      +/-   ##
==========================================
+ Coverage   97.64%   97.69%   +0.04%     
==========================================
  Files         448      448              
  Lines       37085    37085              
==========================================
+ Hits        36212    36229      +17     
+ Misses        873      856      -17     

Flag	Coverage Δ
integration	43.01% <ø> (+0.01%)	⬆️
unit	90.25% <ø> (+0.04%)	⬆️

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[codecov-notifications]

Codecov Report

All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

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