Fix Unable to use ResourceLoader in C# after threaded load in GDScrip… #297

Job	Run time
📊 Static checks / Code style, file formatting, and docs	33s
🤖 Android / Template (target=template_release)	30m 25s
🍎 macOS / Editor (target=editor, tests=yes)	25m 7s
🍏 iOS / Template (target=template_release)	15m 2s
🍎 macOS / Template (target=template_release)	20m 42s
🐧 Linux / Editor w/ Mono (target=editor)	39m 41s
🐧 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)	47m 43s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	24m 11s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	37m 1s
🏁 Windows / Editor (target=editor, tests=yes)	48m 11s
🌐 Web / Template w/o threads (target=template_release, threads=no)	24m 25s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	32m 4s
🏁 Windows / Template (target=template_release)	34m 10s
🐧 Linux / Template w/ Mono (target=template_release)	26m 49s
🐧 Linux / Minimal template (target=template_release, everything disabled)	15m 33s
🪲 Godot CPP / Build and test Godot CPP	7m 58s
	7h 9m 35s

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