Move VS Tools configuration to VC-common target

Move VS Tools configuration to VC-common target

The Windows toolchain is composed of utilites from both the Windows SDK
and the Visual Studio Build Tools. Move the configuration of the latter
utilities into the `VC-common` template inside `10-main.conf`, while
leaving the former utilities in `BASE_Windows`. This allows for other
Windows compilers to be configured inheriting from `BASE_Windows`.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/13540)