swr/rasterizer: improvements in simdlib

1. fix build issues with MSVC 2019 compiler

The MSVC 2019 compiler seems to have an issue with optimized code-gen
when using the _mm256_and_si256() intrinsic.
Only disable use of integer vpand on buggy versions MSVC 2019.
Otherwise allow use of integer vpand intrinsic.

2. Remove unused vec/matrix functionality
13 jobs for !3 with swr-upstream-3-simdlib-improvements in 40 minutes and 53 seconds (queued for 51 minutes and 27 seconds)
merge request