Cherry picks from 1.8

[SpacemanPaul]

Forward-ports of #1022, #1033, #1034, #1035, #1036, #1037 and #1039 from the 1.8 branch (master) to 1.9.

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📚 Documentation preview 📚: https://datacube-ows--1040.org.readthedocs.build/en/1040/

[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 5 lines in your changes missing coverage. Please review.

Project coverage is 93.27%. Comparing base (722bc6e) to head (546ff20).
Report is 39 commits behind head on develop-1.9.

Files with missing lines	Patch %	Lines
datacube_ows/wsgi.py	0.00%	4 Missing ⚠️
datacube_ows/ows_configuration.py	87.50%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           develop-1.9    #1040      +/-   ##
===============================================
- Coverage        93.77%   93.27%   -0.50%     
===============================================
  Files               46       53       +7     
  Lines             6573     7038     +465     
===============================================
+ Hits              6164     6565     +401     
- Misses             409      473      +64     

Files with missing lines	Coverage Δ
datacube_ows/__init__.py	100.00% <100.00%> (ø)
datacube_ows/band_utils.py	99.35% <100.00%> (+0.02%)	⬆️
datacube_ows/config_utils.py	95.30% <100.00%> (+0.72%)	⬆️
datacube_ows/feature_info.py	90.54% <100.00%> (+1.24%)	⬆️
datacube_ows/styles/base.py	95.96% <100.00%> (+0.04%)	⬆️
datacube_ows/styles/ramp.py	95.07% <100.00%> (+0.07%)	⬆️
datacube_ows/wms_utils.py	92.44% <100.00%> (+0.35%)	⬆️
datacube_ows/ows_configuration.py	94.22% <87.50%> (-1.48%)	⬇️
datacube_ows/wsgi.py	0.00% <0.00%> (ø)

... and 4 files with indirect coverage changes