[RV64_DYNAREC] Refined RISC-V vector emitter #4185

Job	Run time
build (X64, Release, ubuntu-latest)	1m 35s
build (X64, Trace, ubuntu-latest)	1m 46s
build (X64, Box32, ubuntu-latest)	1m 43s
build (RISCV, Release, ubuntu-latest)	5m 40s
build (RISCV, Trace, ubuntu-latest)	6m 19s
build (RISCV, StaticBuild, ubuntu-latest)	3m 56s
build (RISCV, Box32, ubuntu-latest)	5m 54s
build (RK3588, Release, ubuntu-latest)	5m 30s
build (RK3588, Trace, ubuntu-latest)	5m 41s
build (RK3588, StaticBuild, ubuntu-latest)	3m 44s
build (RK3588, Box32, ubuntu-latest)	5m 39s
build (ARM64, Release, ubuntu-latest)	5m 19s
build (ARM64, Trace, ubuntu-latest)	5m 38s
build (ARM64, StaticBuild, ubuntu-latest)	3m 39s
build (ARM64, Box32, ubuntu-latest)	5m 46s
build (ANDROID, Release, ubuntu-latest)	2m 8s
build (ANDROID, Trace, ubuntu-latest)	2m 16s
build (TERMUX, Release, ubuntu-latest)	2m 2s
build (TERMUX, Trace, ubuntu-latest)	2m 50s
build (LARCH64, Release, ubuntu-latest)	3m 25s
build (LARCH64, Trace, ubuntu-latest)	3m 34s
build (LARCH64, StaticBuild, ubuntu-latest)	2m 2s
build (LARCH64, Box32, ubuntu-latest)	3m 31s
	1h 29m 37s

Provide feedback