(maint) Enhance local testing developer experience

[corbob]

Description Of Changes

Enhance the local testing setup to allow faster writing and iterating on Pester tests

Motivation and Context

The existing setup required rebuilding the Chocolatey CLI package every time you wanted to test changes to tests.

Testing

1. In the tests directory run vagrant up
2. Verify that the tests run.
3. Delete some (or all) of the pester test files.
4. Run vagrant provision default --provision-with test.
5. Verify that the deleted pester file is no longer executed (when I tested, I went from 29 files evaluated to 28 files evaluated).
6. Run vagrant provision default --provision-with clear-packages,test.
7. Verify that the clear-packages provisioning script runs, followed by the test packages being packaged during the test provisioning script.

Operating Systems Testing

• Host: Windows 10

Change Types Made

• [ ] Bug fix (non-breaking change).
• [ ] Feature / Enhancement (non-breaking change).
• [ ] Breaking change (fix or feature that could cause existing functionality to change).
• [ ] Documentation changes.
• [ ] PowerShell code changes.
• [x] Pester Test execution changes.

Change Checklist

• [ ] Requires a change to the documentation.
• [ ] Documentation has been updated.
• [ ] Tests to cover my changes, have been added.
• [ ] All new and existing tests passed?
• [ ] PowerShell code changes: PowerShell v2 compatibility checked?

Related Issue

N/A

[gep13]

@corbob thank you for making these improvements!