meson: Enable some MSVC warnings for parity with GCC/Clang
meson: Enable some MSVC warnings for parity with GCC/Clang

This makes it easier to do development with MSVC by making it warn
on common issues that GCC/Clang error out for in our CI configuration.

Continuation from https://gitlab.freedesktop.org/gstreamer/gst-build/-/merge_requests/223

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-omx/-/merge_requests/75>

GStreamer/gst-omx,GStreamer/gst-omx,GStreamer/gst-omx