build: remove old constraints and upgrade

[iloveagent57]

• remove outdated constraints
• make target to create a venv
• use constraints in pip.in
• upgrade python deps

Post merge:

• Tag pushed and a new version released
  • Note: Assets will be added automatically. You just need to provide a tag (should match your version number) and title and description.
• After versioned build finishes in GitHub Actions, verify version has been pushed to PyPI
  • Each step in the release build has a condition flag that checks if the rest of the steps are done and if so will deploy to PyPi.
    (so basically once your build finishes, after maybe a minute you should see the new version in PyPi automatically (on refresh))
• PR created in course-discovery to upgrade dependencies (including taxonomy-connector)
  • This must be done after the version is visible in PyPi as make upgrade in course-discovery will look for the latest version in PyPi.

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[pwnage101]

Just a question about the venv make target which seems unused.

[pwnage101]

is this necessary?

[iloveagent57]

Just a convenience for use within containers to manage deps independently of the app the container primarily runs.