Fix cira stretch upcasting the data

[pnuu]

The cira_stretch does a upcast on the data from float32 to float64. This PR changes the _cira_stretch so that the small values are clipped in float64 base and passed on to np.log10() as such, which returns the data as the dtype of the input data.

The match_dtype kwarg was added to run_and_check_enhancement() helper function in enhancement tests. This could be added to other where applicable. I first added the dtype tests to all calls, but there were some int64 input data and didn't want to figure out which tests expect the dtype to stay the same and which enhancements expect it to change.

• Tests added

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.09%. Comparing base (a4b8c8d) to head (5169923).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2956   +/-   ##
=======================================
  Coverage   96.09%   96.09%           
=======================================
  Files         377      377           
  Lines       55074    55089   +15     
=======================================
+ Hits        52924    52939   +15     
  Misses       2150     2150           

Flag	Coverage Δ
behaviourtests	3.94% <0.00%> (-0.01%)	⬇️
unittests	96.19% <100.00%> (+<0.01%)	⬆️

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[mraspaud]

Thanks for fixing this! One request inline.

[mraspaud]

LGTM, nice one with splitting up the test function!

[coveralls]

Pull Request Test Coverage Report for Build 11515862200

Details

• 25 of 25 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.001%) to 96.203%

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Totals
Change from base Build 11485792071:	0.001%
Covered Lines:	53183
Relevant Lines:	55282

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💛 - Coveralls