Add SVE implementation of replace

[hazzlim]

This PR adds an SVE implementation of replace. This algorithm was previously not vectorized using Neon, due to the absence of masked stores in the instruction set. See #4433 for why this is an issue.

Benchmark results ⏲️

Results are speedup values relative to the existing C code as a baseline - higher is better. Benchmark results were obtained running on a Neoverse N2 machine.

	MSVC Speedup	Clang Speedup
r<std::uint8_t>	17.03	7.024
r<std::uint16_t>	10.17	3.767
r<std::uint32_t>	4.592	2.109
r<std::uint64_t>	2.475	1.23

[StephanTLavavej]

Turns out I can't merge this until the MSVC-internal checked-in compiler is updated. The current 14.50 compiler can't understand the new <arm_sve.h> and ICEs quite horribly, and I don't see any possible workaround. (vector_algorithms.cpp has to be built by the checked-in compiler.) The good news is that we should only have to wait a month.