Update devcontainer

[craddm]

:white_check_mark: Checklist

• [x] You have given your pull request a meaningful title (e.g. Enable foobar integration rather than 515 foobar).
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:vertical_traffic_light: Depends on

:arrow_heading_up: Summary

Since Sphinx and document building are now handled by hatch, it is no longer necessary to install sphinx separately using apt. In addition, since requirements.txt is no longer in the docs folder, the devcontainer could not successfully build.

Also updates to the most recent version of Azure CLI.

:closed_umbrella: Related issues

:microscope: Tests

Tested locally

[github-actions[bot]]

Coverage report

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