BaseTools/WindowsVsToolChain: Setup VS2017/VS2019 env

BaseTools/WindowsVsToolChain: Setup VS2017/VS2019 env

https://bugzilla.tianocore.org/show_bug.cgi?id=2495

Update the WindowsVsToolChain plugin to setup the VS2017
or VS2019 development environment.  This is required to
build BaseTools and Structured PCD host applications.

Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Bob Feng <bob.c.feng@intel.com>