winemac: Extract new function from macdrv_EnumClipboardFormats() parameterized by the target pasteboard.

winemac: Extract new function from macdrv_IsClipboardFormatAvailable() parameterized by the target pasteboard.

winemac: Extract new function from macdrv_GetClipboardData() parameterized by the target pasteboard.

... not just the general pasteboard (although the general pasteboard is
still the default).

Mac apps generally put TIFF on the pasteboard, but Windows programs are
more likely to handle CF_DIB or CF_BITMAP which map to BMP.

Intel GPUs don't support d3d7 hardware vertexprocessing on Windows. In
d3d8 and d3d9 it is available starting with i965 chips, but for some
reason the driver does not expose this for d3d7.