Cleanups relating to CurveGFp #6281

Job	Run time
Linux (gcc, shared)	3m 20s
macOS (shared, xcode, macos-13)	4m 38s
Linux (gcc, amalgamation)	3m 38s
macOS (amalgamation, xcode, macos-13)	5m 37s
Linux (gcc, static)	3m 16s
macOS (shared, xcode, macos-14)	2m 50s
Linux (clang, shared)	3m 12s
macOS (amalgamation, xcode, macos-14)	5m 5s
Windows (shared, x86_64, windows-2022)	4m 40s
Windows (static, x86_64, windows-2022)	3m 32s
Analysis (coverage, gcc, ubuntu-24.04)	5m 38s
Windows (amalgamation, x86_64, windows-2022)	4m 41s
Clang Tidy	2m 38s
Windows (shared, x86, windows-2022)	3m 9s
Analysis (sanitizer, clang, ubuntu-24.04)	1m 28s
Analysis (valgrind, clang, ubuntu-24.04)	1m 6s
Analysis (fuzzers, gcc, ubuntu-24.04)	4m 19s
Special (examples, gcc, ubuntu-24.04)	1s
Analysis (lint, gcc, ubuntu-24.04)	1m 46s
Cross (cross-i386, gcc, ubuntu-22.04)	4m 8s
Analysis (format, gcc, ubuntu-24.04)	34s
Cross (cross-arm32, gcc, ubuntu-24.04)	1s
Special (minimized, gcc, ubuntu-24.04)	1s
Analysis (limbo, gcc, ubuntu-24.04)	2m 1s
Cross (cross-arm64, gcc, ubuntu-24.04)	1s
Special (bsi, gcc, ubuntu-24.04)	1s
Cross (cross-ppc64, gcc, ubuntu-24.04)	1s
Special (docs, gcc, ubuntu-24.04)	1s
Cross (cross-mips64, gcc, ubuntu-24.04)	1s
Cross (cross-android-arm64, clang, ubuntu-24.04)	1s
Cross (static, gcc, windows-2022, make)	1m 31s
Special (no_pcurves, gcc, ubuntu-24.04)	1s
Cross (cross-ios-arm64, xcode, macos-13)	2m 37s
	1h 15m 34s

Provide feedback