build: add openssl-system-ca-path to windows

This commit adds the openssl-system-ca-path configuration variable to the windows build system.

C:\node>vcbuild.bat /?
vcbuild.bat [debug/release] [msi]
...
[openssl-system-ca-path path-to-system-certs] [clean]
Examples:
  vcbuild.bat                              : builds release build
  ...
  vcbuild.bat openssl-system-ca-path path  : builds using the specified
  path to system CA (PEM format) in addition to the OpenSSL supplied
  CA store or compiled-in Mozilla CA copy

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

Affected core subsystem(s)

build

cc @nodejs/build @nodejs/platform-windows

_{[refack edited checklist formatting (since GitHub parses it)]}