Please, for the love of God, Jesus and Bastet, ADD EVERY OPENGL COMMAND REGARDLESS OF THE FREAKING RENDERER!!!!!!!!!!!!!!!!!!!!!!!!!!!

Don't flush every texture just because the palette MAY have changed

Merge branch 'opengl-is-a-bad-renderer' of https://git.magicalgirl.moe/STJr/SRB2 into opengl-is-a-bad-renderer

Fix All the buidlbot issues

See merge request !520

(done by calling HWR_LoadTextures, which in turn calls HWR_FreeTextureCache)

Actually don't even call HWR_FreeMipmapCache between levels because I feel like it's futile outside of PWAD loading

Remove patch.pk3 from cmake

See merge request !516

Get 2.2(.0) release ready

Closes #461

See merge request STJr/SRB2Internal!615

Lengthen credits for msuic parity

See merge request STJr/SRB2Internal!620