Refactor more constants to kConstant notation #2571

Job	Run time
Get version info	22s
Check code formatting	48s
Check changelog formatting	6s
g2.dat	12s
Ubuntu Linux (AppImage, x86_64)	4m 54s
Emscripten	10m 41s
Ubuntu Linux (noble, debug, [http, network, flac, vorbis OpenGL] disabled) using clang	8m 50s
Android	17m 38s
Ubuntu Linux (debug) using clang, coverage enabled	6m 52s
Ubuntu Linux (Docker)	1s
Ubuntu Linux (noble, x86_64, portable)	6m 22s
macOS (x64) using CMake	3m 27s
Debian Linux (bookworm, x86_64, portable)	5m 58s
macOS (arm64) using CMake	3m 42s
Windows (win32)	9m 14s
Windows (win32) using mingw	4m 35s
Windows (x64)	9m 43s
Windows (arm64)	10m 20s
macOS universal app bundle	35s
Release	14s
	1h 44m 34s

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