Add "missing description" tag to constant & enum documentation #19868

Job	Run time
📊 Static checks / Code style, file formatting, and docs	45s
🤖 Android / Template (target=template_release)	3m 37s
🌐 Web / Template (target=template_release)	1m 15s
🐧 Linux / Editor w/ Mono (target=editor)	4m 8s
🍏 iOS / Template (target=template_release)	4m 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)	18m 47s
🍎 macOS / Editor (target=editor, tests=yes)	6m 37s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	8m 12s
🏁 Windows / Editor (target=editor, tests=yes)	7m 43s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	5m 41s
🍎 macOS / Template (target=template_release)	4m 5s
🏁 Windows / Template (target=template_release)	6m 35s
🐧 Linux / Template w/ Mono (target=template_release)	1m 43s
🐧 Linux / Minimal template (target=template_release, everything disabled)	1m 21s
🪲 Godot CPP / Build and test Godot CPP	6m 42s
	1h 21m 49s

Provide feedback