[GR-64794] Vector API: Implement Vector::compress/expand

[graalvmbot]

This PR adds support for intrinsification of Vector::compress and Vector::expand on AVX512.

Vector::compress extracts elements from the source vector according to a mask, then puts them into the first elements of the destination vector one-by-one. The remaining elements in the destination vector are zeroed. This operation is useful for text transcoding, for example, when converting a UTF-32 sequence to UTF-8, we can use compress to contract the fixed-sized code points of UTF-32 to the variable-sized code points of UTF-8.

Vector::expand is the opposite operation, it takes the elements from the source vector one-by-one and put them at each element in the destination vector such that the corresponding element in the mask operand is set.

AVX-512 has dedicated instruction for compress and expand. With this patch, Vector::compress(src, mask) is compiled into vpcompressd dst{mask}, src, Vector::expand(src, mask) is compiled into vpexpandd dst{mask}, src.

Please kindly review, thanks a lot.