Importer version system for files imported in older Godot versions #669

Job	Run time
📊 Static checks / Code style, file formatting, and docs	3m 52s
🤖 Android / Template (target=template_release)	11m 12s
🐧 Linux / Editor w/ Mono (target=editor)	14m 20s
🐧 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)	30m 55s
🍏 iOS / Template (target=template_release)	2m 24s
🍎 macOS / Editor (target=editor, tests=yes)	9m 57s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	14m 20s
🍎 macOS / Template (target=template_release)	5m 41s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	19m 6s
🌐 Web / Template (target=template_release)	1m 30s
🐧 Linux / Template w/ Mono (target=template_release)	7m 3s
🏁 Windows / Editor (target=editor, tests=yes)	28m 31s
🐧 Linux / Minimal template (target=template_release, everything disabled)	3m 34s
🏁 Windows / Template (target=template_release)	14m 8s
🪲 Godot CPP / Build and test Godot CPP	14m 8s
	3h 0m 41s

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