C#: Use export platform to determine the target OS and log errors #38042

Job	Run time
📊 Static checks / Code style, file formatting, and docs	48s
🤖 Android / Editor (target=editor)	5m 6s
🤖 Android / Template arm32 (target=template_release, arch=arm32)	3m 22s
🤖 Android / Template arm64 (target=template_release, arch=arm64)	3m 47s
🍏 iOS / Template (target=template_release)	2m 4s
🍎 macOS / Editor (target=editor, tests=yes)	4m 30s
🍎 macOS / Template (target=template_release)	3m 19s
🐧 Linux / Editor w/ Mono (target=editor)	4m 48s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	6m 23s
🐧 Linux / Editor with doubles and GCC sanitizers (target=editor, tests=yes, dev_build=yes, scu_build=yes, precision=double, use_asan=yes, use_ubsan=yes, linker=gold)	15m 53s
🌐 Web / Template w/o threads (target=template_release, threads=no)	7m 35s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	7m 10s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	7m 28s
🏁 Windows / Editor (target=editor, tests=yes)	9m 44s
🐧 Linux / Template w/ Mono (target=template_release)	1m 45s
🏁 Windows / Editor w/ clang-cl (target=editor, tests=yes, use_llvm=yes)	6m 21s
🏁 Windows / Template (target=template_release)	9m 27s
🐧 Linux / Minimal template (target=template_release, everything disabled)	2m 13s
🪲 Godot CPP / Build and test Godot CPP	8m 16s
	1h 49m 59s

Provide feedback