Bug fix for installing from ADO feeds with v2 endpoints

[alerickson]

PR Summary

Note: this PR should be reviewed after PR #1428.

This PR modifies the request url for ADO v2 feeds. GET requests for packages installation require a query that looks like either:
https://pkgs.dev.azure.com/<org>/<project>/_packaging/<feed>/nuget/v2/Packages(Id='<pkgName>',Version='<pkgVersion')

or

https://pkgs.dev.azure.com/<org>/<project>/_packaging/<feed>/nuget/v2?id=<pkgName>&version=<pkgVersion>

PR Context

Resolves #1422

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