Pydev debug

[SpacemanPaul]

As raised in #953, the $PYDEV_DEBUG environment variable's value was not checked - setting it to anything other than an empty string resulted in debugging being turned on. As the examples in documentation set it to "yes", this caused confusion with explicitly setting the environment variable to e.g. "no" resulted in debugging being turned on.

This PR checks for the following values: "N", "NO", F" and "FALSE" (evaluated case insensitively) and treats them as deactivating debugging.

(This PR also manually applies the pre-commit updates raised by pre-commit-ci in #951)

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📚 Documentation preview 📚: https://datacube-ows--955.org.readthedocs.build/en/955/

[codecov]

Codecov Report

Merging #955 (a3565a3) into master (e08f9cc) will decrease coverage by 0.01%.
Report is 6 commits behind head on master.
The diff coverage is 83.33%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #955      +/-   ##
==========================================
- Coverage   93.73%   93.72%   -0.01%     
==========================================
  Files          43       43              
  Lines        6496     6489       -7     
==========================================
- Hits         6089     6082       -7     
  Misses        407      407              

Files	Coverage Δ
datacube_ows/__init__.py	100.00% <100.00%> (ø)
datacube_ows/ogc.py	85.18% <ø> (-0.53%)	⬇️
datacube_ows/startup_utils.py	92.61% <80.00%> (-0.10%)	⬇️