Emscripten: Allow for Multiple Windows #4976

Job	Run time
Create test plan	6s
level1 / Haiku	1m 51s
level2 / Windows (msys2, clang64)	4m 23s
level2 / LoongArch64	2m 15s
level2 / Sony PlayStation 2	5m 12s
level2 / Ubuntu 22.04 (Intel Compiler)	4m 16s
level2 / MacOS (Framework) (arm64)	3m 8s
level2 / Android (Android.mk)	1m 27s
level2 / Windows (msys2, mingw32)	5m 30s
level2 / PowerPC	2m 33s
level2 / Ubuntu 24.04 (ARM64)	6m 25s
level2 / MacOS (Framework) (x64)	7m 58s
level2 / Windows (MSVC, clang-cl x86)	6m 13s
level2 / Ubuntu 22.04	2m 42s
level2 / Windows (MSVC, x86)	6m 16s
level2 / FreeBSD	2m 49s
level2 / GDK (MSVC, x64)	2m 28s
level2 / Android (CMake)	2m 10s
level2 / Windows (msys2, mingw64)	5m 27s
level2 / tvOS (CMake & xcode)	2m 9s
level2 / iOS (CMake & xcode)	2m 9s
level2 / NetBSD	2m 52s
level2 / Windows (MSVC, ARM)	4m 44s
level2 / Windows (MSVC, clang-cl x64)	6m 5s
level2 / Sony PlayStation Vita (GLES w/ PVR_PSP2)	2m 50s
level2 / RISC OS	1m 22s
level2 / MacOS (GNU prefix)	3m 24s
level2 / Ubuntu 22.04 (Intel oneAPI)	4m 40s
level2 / Sony PlayStation Vita (GLES w/ pib)	2m 53s
level2 / Steam Linux Runtime (Sniper)	2m 49s
level2 / Sony PlayStation Portable	4m 3s
level2 / Windows (MSVC, x64)	6m 8s
level2 / Windows (MSVC, ARM64)	4m 30s
level2 / Windows (msys2, ucrt64)	4m 51s
level2 / Nintendo 3DS	2m 3s
level2 / PowerPC64	2m 11s
level2 / Emscripten	8m 10s
level2 / Android (CMake, lean)	2m 16s
level2 / Android (Gradle)	2m 19s
	2h 25m 37s

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