[confcom] Run testing against built extension

[DomAyre]

Why

This repos CI uses azdev to run each extensions tests, however this means it's testing the local modules which might have breaking differences compared to what we ship to customers.

How

• Add a new autouse pytest fixture (currently scoped to the confcom extension but designed to apply to all extensions) which builds wheels for each extension being tested, and swaps out the non-test modules

The modules actually running the tests are the only part not swapped for the built version to handle tests which rely on unshipped code/data

---

This checklist is used to make sure that common guidelines for a pull request are followed.

Related command

General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally? (pip install wheel==0.30.0 required)
• My extension version conforms to the Extension version schema

Note: This is strictly a testing only change, so no version bump or history update is required

[azure-client-tools-bot-prd]

️✔️Azure CLI Extensions Breaking Change Test

️✔️Non Breaking Changes

[azure-client-tools-bot-prd]

Hi @DomAyre,
Please write the description of changes which can be perceived by customers into HISTORY.rst.
If you want to release a new extension version, please update the version in setup.py as well.

[yonzhan]

Thank you for your contribution! We will review the pull request and get back to you soon.

[github-actions]

The git hooks are available for azure-cli and azure-cli-extensions repos. They could help you run required checks before creating the PR.

Please sync the latest code with latest dev branch (for azure-cli) or main branch (for azure-cli-extensions).
After that please run the following commands to enable git hooks:

pip install azdev --upgrade
azdev setup -c <your azure-cli repo path> -r <your azure-cli-extensions repo path>

[github-actions]

• For more info about extension versioning, please refer to Extension version schema