Adding additional finite field and carryless multiplication ops

There are some additional finite field and carryless multiplication ops that have actual use cases, including cryptography (including SM4, Camellia, Grain128-AEADv2, and post-quantum crytography), hashing (including Groestl hash, Toeplitz hash, and CRC checksums), and Reed-Solomon error correction.

Here are the proposed additional finite field and carryless multiplication ops:
- VU8 **CLMul**(VU8 a, VU8 b) - does carryless multiplication of `a[i]` and `b[i]`, returning the lower 8 bits without any modular reduction, equivalent to NEON `vmul_p8` or SVE2 `svpmul_u8`
- VU16 **WidenCLMul**(DU16, VU8 a, VU8 b) - does carryless multiplication of `a[i]` and `b[i]`, returned as a U16, equivalent to NEON `vmull_p8`
- VU8 **CLMulHigh**(VU8 a, VU8 b) - does carryless multiplication of `a[i]` and `b[i]`, returning the upper 8 bits, equivalent to `DemoteTo(du8, ShiftRight<8>(WidenCLMulLower(du16, a, b)))`
- VU8 **GF2P8Mul**(VU8 a, VU8 b) - does carryless multiplication of `a[i]` and `b[i]` followed by finite field modular reduction by x⁸ + x⁴+ x³ + x + 1, equivalent to GFNI `_mm_gf2p8mul_epi8`
- VU16 **CLMulEven**(DU16, VU8 a, VU8 b) - does carryless multiplication of `a[2*i]` and `b[2*i]` - equivalent to SVE2 `svpmullb_u16`
- VU16 **CLMulOdd**(DU16, VU8 a, VU8 b) - does carryless multiplication of `a[2*i+1]` and `b[2*i+1]` - equivalent to SVE2 `svpmullt_u16`
- VU16 **CLWidenMulPairwiseAdd**(DU16, VU8 a, VU8 b) - equivalent to `Xor(CLMulEven(du16, a, b), CLMulOdd(du16, a, b))` or PPC8 `vec_pmsum_be(a, b)`
- VU8 **GF2P8MulInverse**(VU8 v) - computes the GF(2^8) multiplicative inverse of `v[i]` (modulo x⁸ + x⁴+ x³ + x + 1) - equivalent to GFNI `_mm_gf2p8affineinv_epi64_epi8(v, _mm_set1_epi64x(0x0102040810204080), 0x00)`
- VU8 **GaloisAffine**<uint64_k kMatrix, uint8_t kXorMask>(VU8 v) - applies affine transform `kMatrix` to `v[i]` - equivalent to GFNI `_mm_gf2p8affine_epi64_epi8(v, _mm_set1_epi64x(static_cast(kMatrix)), kXorMask)`
- VU8 **GaloisAffineInv**<uint64_k kMatrix, uint8_t kXorMask>(VU8 v) - equivalent to `GaloisAffine(GF2P8MulInverse(v))` or GFNI `_mm_gf2p8affineinv_epi64_epi8(v, _mm_set1_epi64x(static_cast(kMatrix)), kXorMask)`