GLTF export: Remove snapping and fix validation #25052

Job	Run time
📊 Static checks / Code style, file formatting, and docs	4m 5s
🍏 iOS / Template (target=template_release)	2m 32s
🍎 macOS / Editor (target=editor, tests=yes)	3m 40s
🍎 macOS / Template (target=template_release)	2m 52s
🐧 Linux / Editor w/ Mono (target=editor)	6m 12s
🐧 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)	19m 55s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	3m 58s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	5m 12s
🤖 Android / Template (target=template_release)	3m 24s
🌐 Web / Template w/o threads (target=template_release, threads=no)	3m 53s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	7m 18s
🏁 Windows / Editor (target=editor, tests=yes)	8m 1s
🐧 Linux / Template w/ Mono (target=template_release)	2m 12s
🏁 Windows / Template (target=template_release)	6m 51s
🐧 Linux / Minimal template (target=template_release, everything disabled)	1m 41s
🪲 Godot CPP / Build and test Godot CPP	6m 50s
	1h 28m 36s

Provide feedback