Further fixes and improvements related to WebAssembly #12959

Job	Run time
Code style check / Code style check	7s
IWYU / IWYU	3m 6s
CodeChecker / CodeChecker	31m 37s
MSVC / MSVC (SDL2 x86)	3m 37s
MSVC / MSVC (SDL2 x64)	4m 8s
SonarCloud Analyzer / SonarCloud Analyzer	0s
Make / Make (Nintendo Switch)	3m 14s
Android / Android	9m 43s
Make / Make (PS Vita)	9m 57s
CMake / CMake (Windows SDL2)	4m 42s
Make / Make (Emscripten)	5m 22s
CMake / CMake (Linux SDL2)	2m 9s
CMake / CMake (macOS SDL2)	1m 34s
CMake / CMake (macOS SDL2 App Bundle)	1m 38s
Make / Make (Linux x86-64 SDL2 Release)	3m 0s
Make / Make (Linux x86-64 SDL2 Debug)	3m 0s
Make / Make (Linux ARM64 SDL2 Release)	4m 12s
Make / Make (Linux ARM64 SDL2 Debug)	4m 33s
Make / Make (macOS SDL2)	3m 18s
Make / Make (macOS SDL2 App Bundle)	1m 35s
	1h 40m 32s

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