Fix Tree minimum size calculation #28518

Job	Run time
📊 Static checks / Code style, file formatting, and docs	3m 53s
🤖 Android / Template (target=template_release)	30m 31s
🍎 macOS / Editor (target=editor, tests=yes)	4m 17s
🍏 iOS / Template (target=template_release)	9m 4s
🍎 macOS / Template (target=template_release)	3m 21s
🐧 Linux / Editor w/ Mono (target=editor)	39m 5s
🐧 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 0s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	6m 45s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	22m 30s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	6m 44s
🏁 Windows / Editor (target=editor, tests=yes)	9m 21s
🌐 Web / Template w/o threads (target=template_release, threads=no)	22m 35s
🏁 Windows / Template (target=template_release)	33m 26s
🐧 Linux / Template w/ Mono (target=template_release)	24m 35s
🐧 Linux / Minimal template (target=template_release, everything disabled)	13m 42s
🪲 Godot CPP / Build and test Godot CPP	7m 3s
	4h 14m 52s

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