Add sm2p256v1 pcurves optimizations #5577

Job	Run time
Clang Tidy	39s
Linux (gcc, shared)	1m 39s
Analysis (coverage, gcc, ubuntu-24.04)	26m 47s
Linux (gcc, amalgamation)	3m 38s
Analysis (sanitizer, msvc, windows-2022, ninja)	19m 22s
Linux (gcc, static)	1m 35s
Analysis (sanitizer, clang, ubuntu-24.04)	10m 42s
Linux (clang, shared)	1m 55s
Analysis (sanitizer, gcc, ubuntu-24.04)	17m 19s
macOS (shared, xcode, macos-13)	3m 40s
Analysis (valgrind, clang, ubuntu-24.04)	20m 13s
macOS (amalgamation, xcode, macos-13)	4m 3s
Analysis (fuzzers, gcc, ubuntu-24.04)	6m 6s
Special (examples, gcc, ubuntu-24.04)	31s
macOS (shared, xcode, macos-14)	2m 12s
Analysis (lint, gcc, ubuntu-24.04)	41s
Special (minimized, gcc, ubuntu-24.04)	16s
macOS (amalgamation, xcode, macos-14)	2m 26s
Analysis (format, gcc, ubuntu-24.04)	20s
Special (bsi, gcc, ubuntu-24.04)	43s
Analysis (limbo, gcc, ubuntu-24.04)	52s
Special (docs, gcc, ubuntu-24.04)	50s
Windows (shared, x86_64, windows-2022)	5m 10s
Windows (static, x86_64, windows-2022)	3m 28s
Cross (cross-i386, gcc, ubuntu-22.04)	2m 22s
Windows (amalgamation, x86_64, windows-2022)	4m 49s
Cross (cross-arm32, gcc, ubuntu-24.04)	9m 27s
Cross (cross-arm64, gcc, ubuntu-24.04)	6m 4s
Windows (shared, x86, windows-2022)	8m 6s
Cross (cross-ppc64, gcc, ubuntu-24.04)	5m 53s
Cross (cross-mips64, gcc, ubuntu-24.04)	6m 7s
Cross (cross-android-arm64, clang, ubuntu-24.04)	43s
Cross (static, gcc, windows-2022, make)	3m 59s
Cross (cross-ios-arm64, xcode, macos-13)	51s
	3h 3m 28s

Provide feedback