Remove or replace articles (or sections) pertaining to Moq as a recommended testing framework

[IEvangelist]

Any and all places where Moq is recommended, or used will need to be updated. We should take the following action:

• Replace articles (or sections) pertaining to Moq as a recommended testing framework with NSubstitute.
• Remove articles (or sections) that cannot otherwise be replaced.

See: https://github.com/moq/moq/issues/1372

There's a serious privacy concern, as a result this package no longer instills trust. We'll explore replacing it with NSubstitute where applicable.

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Associated WorkItem - 145863

[webprofusion-chrisc]

This issue is no longer valid. The related change to Moq has been reverted and nothing in the docs refers to a specifically affected version of Moq.

On the idealogical concerns, Microsoft has a moral responsibility to encourage sustainable development models and the bug is actually in NuGet lacking proper support for paid packages.