Make some achievement settings (including Hardcore mode) configurable per-game. #8420

Job	Run time
build-uwp	9m 3s
build-windows (x64)	11m 30s
build (ubuntu-latest, test, clang, clang++, ./b.sh --headless --unittest, clang-normal)	3m 29s
build-windows (ARM64)	9m 40s
build (ubuntu-latest, gcc, g++, ./b.sh --headless --unittest, gcc-normal)	3m 19s
build (ubuntu-latest, android, clang, clang++, cd android && ./ab.sh -j2 APP_ABI=arm64-v8a UNITTE...	9m 55s
build (ubuntu-latest, android, clang, clang++, cd android && ./ab.sh -j2 APP_ABI=armeabi-v7a UNIT...	6m 30s
build (ubuntu-latest, android, clang, clang++, cd android && ./ab.sh -j2 APP_ABI=x86_64 UNITTEST=...	9m 28s
build (ubuntu-latest, android, clang, clang++, cd android && ./ab.sh -j2 APP_ABI=arm64-v8a OPENXR...	10m 30s
build (ubuntu-latest, android, clang, clang++, ./b.sh --libretro_android ppsspp_libretro, android...	5m 33s
build (ubuntu-latest, qt, gcc, g++, ./b.sh --qt, qt)	3m 30s
build (ubuntu-latest, libretro, gcc, g++, make -C libretro -f Makefile -j2, gcc-libretro)	3m 27s
build (ubuntu-latest, libretro, clang, clang++, make -C libretro -f Makefile -j2, clang-libretro)	3m 23s
build (macos-latest, test, clang, clang++, ./b.sh --headless --unittest --fat --no-png --no-sdl2,...	19m 52s
build (macos-latest, ios, clang, clang++, ./b.sh --ios, ios)	7m 23s
test-windows	46s
test (ubuntu-latest)	54s
test (macos-latest)	40s
	1h 58m 52s

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