Switch to no-guess-dev version scheme

[pjonsson]

This avoids counting the dirty bit
when computing the version number,
so the partial repository inside
the Docker image doesn't matter.

Fixes #897

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📚 Documentation preview 📚: https://datacube-explorer--935.org.readthedocs.build/en/935/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.14%. Comparing base (f33d623) to head (380577f).
⚠️ Report is 4 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #935   +/-   ##
========================================
  Coverage    84.14%   84.14%           
========================================
  Files           35       35           
  Lines         4207     4207           
  Branches       527      527           
========================================
  Hits          3540     3540           
  Misses         476      476           
  Partials       191      191           

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[omad]

Interesting.. but there's a few big drawbacks with this too.

There's no indication in the version number whether the build directory was clean or dirty. Even when building outside of Docker.

I think that what we actually need to do is either get rid of or greatly shrink the .dockerignore file. We're "building" the package inside of docker, and to do that, we need a clean git directory, and working around that is just tying us up in knots.

We manage what gets included in the built docker image in other ways, and .dockerignore is unnecessary. There's small efficiency wins with having it not bloat the build context. For example, with uv it makes a lot of sense to exclude .venv/, otherwise that will all get sent to the builder.