Cleanup

[SpacemanPaul]

• Added, fixed and updated type hints throughout.
• Split data.py into 3 modules. The new modules are loading.py and feature_info.py.
• Split ogc_utils.py into 3 modules. The new modules are http_utils.py and time_utils.py
• Redundant pool of connection pools greatly simplified
• Fix documentation typos noted from 1.9 postgres compatibility #1009
• Several weird corner case bugs fixed or at least commented.
• Added mypy github check
• removed isort github check
• applied Robbi's Fix data links for products indexed with STAC metadata #1011 fix
• Updated license headers

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📚 Documentation preview 📚: https://datacube-ows--1012.org.readthedocs.build/en/1012/

[codecov]

Codecov Report

Attention: Patch coverage is 91.56627% with 126 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (develop-1.9@22c4a78). Click here to learn what that means.

Additional details and impacted files

@@              Coverage Diff               @@
##             develop-1.9    #1012   +/-   ##
==============================================
  Coverage               ?   93.77%           
==============================================
  Files                  ?       47           
  Lines                  ?     6631           
  Branches               ?        0           
==============================================
  Hits                   ?     6218           
  Misses                 ?      413           
  Partials               ?        0           

Files	Coverage Δ
datacube_ows/__init__.py	100.00% <ø> (ø)
datacube_ows/band_utils.py	99.32% <ø> (ø)
datacube_ows/cfg_parser_impl.py	98.68% <100.00%> (ø)
datacube_ows/config_toolkit.py	100.00% <100.00%> (ø)
datacube_ows/cube_pool.py	100.00% <100.00%> (ø)
datacube_ows/gunicorn_config.py	0.00% <ø> (ø)
datacube_ows/legend_generator.py	100.00% <100.00%> (ø)
datacube_ows/legend_utils.py	94.11% <ø> (ø)
datacube_ows/ogc.py	85.18% <100.00%> (ø)
datacube_ows/ogc_exceptions.py	98.50% <100.00%> (ø)
... and 37 more

[omad]

That's so weird, the documentation for the s-weigand/setup-conda action does define that the Last channel gets the highest priority. So, this is correct and what we want, it just looks really weird.

[omad]

This is way too much in a PR, but, the automated checks pass, so, Approve.