kernel32/tests: initial tests for cdrom.c

Dan Kegel wrote:
> These require a DVD in the drive, so they are skipped without
> WINETEST_INTERACTIVE=1.

I don't see the causality. Presumably the tests require no human intervention.

winmm/tests/mcicda also skips tests if no CD-ROM is in the bay.

However, even a regular winetest.exe run *will* run as many tests as it can
should it find a CD-ROM.  Users are invited to submit test results
to test.winehq with audio and/or mixed data CD-ROMs in the drive.

There's no need for winetest_interactive here.

Regards,
    Jörg Höhle