[Core] Fix incorrect comparison for `Array` const iterator #27621

Job	Run time
📊 Static checks / Code style, file formatting, and docs	3m 35s
🐧 Linux / Editor w/ Mono (target=editor)	33m 33s
🐧 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)	30m 54s
🤖 Android / Template (target=template_release)	25m 10s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	30m 50s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	19m 10s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	27m 43s
🌐 Web / Template w/o threads (target=template_release, threads=no)	19m 15s
🍏 iOS / Template (target=template_release)	26m 33s
🐧 Linux / Template w/ Mono (target=template_release)	20m 33s
🍎 macOS / Editor (target=editor, tests=yes)	42m 20s
🐧 Linux / Minimal template (target=template_release, everything disabled)	13m 49s
🍎 macOS / Template (target=template_release)	26m 40s
🏁 Windows / Editor (target=editor, tests=yes)	39m 51s
🏁 Windows / Template (target=template_release)	28m 26s
🪲 Godot CPP / Build and test Godot CPP	7m 0s
	6h 35m 22s

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