RFC: replace relative system/speed scale with user-defined transform callback #3153

Job	Run time
Create test plan	5s
level1 / Haiku	2m 2s
level2 / Ubuntu 22.04	1m 33s
level2 / RISC OS	1m 16s
level2 / Android (Gradle)	2m 2s
level2 / LoongArch64	2m 59s
level2 / PowerPC64	1m 49s
level2 / Sony PlayStation Vita (GLES w/ PVR_PSP2)	3m 14s
level2 / Sony PlayStation Vita (GLES w/ pib)	3m 20s
level2 / Windows (MSVC, x86)	4m 51s
level2 / NetBSD	1m 51s
level2 / PowerPC	1m 47s
level2 / Windows (msys2, mingw32)	8m 59s
level2 / Sony PlayStation Portable	3m 49s
level2 / GDK (MSVC, x64)	1m 34s
level2 / FreeBSD	2m 14s
level2 / Ubuntu 20.04 (Intel Compiler)	3m 42s
level2 / Windows (MSVC, clang-cl x86)	5m 47s
level2 / MacOS (Framework) (arm64)	2m 16s
level2 / Android (CMake, lean)	2m 53s
level2 / Windows (msys2, clang32)	7m 30s
level2 / Ubuntu 20.04	1m 53s
level2 / MacOS (Framework) (x64)	5m 5s
level2 / Windows (msys2, clang64)	5m 50s
level2 / Windows (msys2, ucrt64)	8m 23s
level2 / Windows (MSVC, ARM64)	4m 6s
level2 / Windows (MSVC, ARM)	3m 28s
level2 / iOS (CMake & xcode)	2m 6s
level2 / Windows (MSVC, x64)	5m 28s
level2 / tvOS (CMake & xcode)	1m 53s
level2 / MacOS (GNU prefix)	3m 5s
level2 / Android (CMake)	2m 53s
level2 / Sony PlayStation 2	5m 5s
level2 / Nintendo 3DS	2m 4s
level2 / Ubuntu 20.04 (Intel oneAPI)	3m 57s
level2 / Android (Android.mk)	1m 12s
level2 / Emscripten	9m 30s
level2 / Windows (msys2, mingw64)	8m 2s
level2 / Windows (MSVC, clang-cl x64)	5m 11s
level2 / Steam Linux Runtime (Sniper)	1m 43s
	2h 26m 27s

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