Fix NavigationObstacle3D debug not reacting to visibility changes #24347

Job	Run time
📊 Static checks / Code style, file formatting, and docs	52s
🍏 iOS / Template (target=template_release)	2m 36s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	4m 34s
🌐 Web / Template w/o threads (target=template_release, threads=no)	4m 45s
🤖 Android / Template (target=template_release)	4m 34s
🐧 Linux / Editor w/ Mono (target=editor)	6m 3s
🐧 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)	16m 33s
🍎 macOS / Editor (target=editor, tests=yes)	4m 23s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	5m 40s
🍎 macOS / Template (target=template_release)	3m 34s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	7m 16s
🐧 Linux / Template w/ Mono (target=template_release)	2m 30s
🏁 Windows / Editor (target=editor, tests=yes)	9m 15s
🐧 Linux / Minimal template (target=template_release, everything disabled)	2m 9s
🏁 Windows / Template (target=template_release)	8m 11s
🪲 Godot CPP / Build and test Godot CPP	6m 57s
	1h 29m 52s

Provide feedback