Improve saving of built-in resources #18567

Job	Run time
📊 Static checks / Code style, file formatting, and docs	45s
🍏 iOS / Template (target=template_release)	29m 46s
🤖 Android / Template (target=template_release)	27m 24s
🐧 Linux / Editor w/ Mono (target=editor)	34m 10s
🌐 Web / Template (target=template_release)	18m 15s
🍎 macOS / Editor (target=editor, tests=yes)	42m 51s
🐧 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)	37m 4s
🍎 macOS / Template (target=template_release)	14m 42s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	29m 56s
🏁 Windows / Editor (target=editor, tests=yes)	40m 3s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	27m 13s
🏁 Windows / Template (target=template_release)	28m 21s
🐧 Linux / Template w/ Mono (target=template_release)	24m 21s
🐧 Linux / Minimal template (target=template_release, everything disabled)	14m 18s
🪲 Godot CPP / Build and test Godot CPP	6m 47s
	6h 15m 56s

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