Insertion tool requires a very large number of manual changes for new CoreFX dependencies

The worst part is that some of these changes need to *already be in the branch* when the tool runs, so it will fail automated insertion unless these changes are added separately.

As far as I can tell, here's a complete list of things that need to be updated when a new CoreFX dependency gets added:

* A new line for the version in `src/ProductData/AssemblyVersions.tt`
* Two new lines for each dependency in `src/ProductData/versions.xml`
* New entries in every `*.config.tt` file below `src/appid`
* A new binding redirect in `src/VSSDK/VSIntegration/ISOShell/Templates/VSShellTemplate/VSShellIso/VSShellStubExe/Stub.exe.config`

It's not clear how many of these are actually necessary, but the insertion tool should probably do all of them automatically.