test: update pipeline to allow testing with dev libraries

[hallvictoria]

Description

1. Adds two new options when running tests:

• Run using dev version of azure-functions
• Run using dev version of azurefunctions-extensions-xxx

If pipeline variables are set to true:

• Dev version of package (either azure-functions or specificed extensions package) will be pulled from the latest official build of that respective repo
• Dev package will be installed (instead of released version)
• Integration tests (E2E, unit, and LC) will run using the dev package

Default is that all variables are set to false, and the test pipeline runs with the released packages.

2. Fixes permissions issue in public build where 1ES PT tries to tag the build but the build is from a fork.

Fixes #

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• New Unit tests were added for the changes made and CI is passing.

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