multimedia/mpv: update to 0.30.0

ABI is compatible but rebuild consumers anyway in case some can take
advantage of new APIs e.g., https://github.com/mpv-player/mpv/commit/e08f235578aa

• DVDREAD is no longer supported after https://github.com/mpv-player/mpv/commit/622940498525
• DVDNAV needs libdvdred after https://github.com/mpv-player/mpv/commit/34e6a26f4d5a
• TEST needs newer dependency after https://github.com/mpv-player/mpv/commit/293dfc782552
• V4L can no longer use tv:// after https://github.com/mpv-player/mpv/commit/b30e85508a30
• VULKAN option uses libplacebo after https://github.com/mpv-player/mpv/commit/7006d6752d7d
• ZIMG to support --vf=fingerprint after https://github.com/mpv-player/mpv/commit/9cfeafa89e2e
• ZSH option is no longer needed after https://github.com/mpv-player/mpv/commit/2712db823884
• Drop --disable-vapoursynth-lazy after https://github.com/mpv-player/mpv/commit/fb8d240c4d04
• Add --disable-shaderc to avoid no longer used dependency brought via libplacebo

Changes: https://github.com/mpv-player/mpv/releases/tag/v0.30.0