We have multiple wrapper classes for the TFS client which let us fall

back on whatever tools are available on the system (TF, TEE, or TF Helper).

Our TF wrapper checks that we're using the TFVC version from Visual

Studio 2017 (version 15), and blocks all other versions. At the time VS 2017

was the latest version, but now the latest version is Visual Studio

2022, which uses version 17 of TFVC. This change allows us to use any

version of TFVC higher than or equal to 15. This also updates the

documentation accordingly.

Ran unit tests.
Used rbt post to post a change from a TFVC repo using Visual Studio 2022.