Fix property groups overriding real properties #16564

Job	Run time
📊 Static checks / Code style, file formatting, and docs	30s
🐧 Linux / Editor w/ Mono (target=editor)	3m 16s
🍏 iOS / Template (target=template_release)	2m 38s
🐧 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)	13m 59s
🤖 Android / Template (target=template_release)	3m 12s
🍎 macOS / Editor (target=editor, tests=yes)	5m 43s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	5m 39s
🍎 macOS / Template (target=template_release)	3m 44s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	6m 32s
🐧 Linux / Template w/ Mono (target=template_release)	1m 19s
🌐 Web / Template (target=template_release)	1m 27s
🐧 Linux / Minimal template (target=template_release, everything disabled)	1m 57s
🏁 Windows / Editor (target=editor, tests=yes)	7m 13s
🏁 Windows / Template (target=template_release)	6m 29s
🪲 Godot CPP / Build and test Godot CPP	7m 5s
	1h 10m 43s

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