template - Move license URL to verification file

It is proposed to move the license URL from `LICENSE.txt` to `VERIFICATION.txt`. Reasons:
* Most (if not all) core team packages are already placing the URL in verification file.
* It makes sense not to modify 3rd party files. Many software already provides `LICENSE.txt` as a file.

This two reasons have been supported by two member and two contributors in chocolatey-community/chocolatey-coreteampackages#1294. Affected source folder:

https://github.com/chocolatey/choco/blob/master/src/chocolatey/infrastructure.app/templates/

Start by inspecting the templates in src/chocolatey/infrastructure.app/templates/ and compare how LICENSE.txt and VERIFICATION.txt are populated. Move the license URL so it is placed in VERIFICATION.txt rather than LICENSE.txt, then verify the affected templates no longer modify the license file.

Written by the indexing model from the issue text.