Add Array.sort_stable and Array.sort_custom_stable #74

Job	Run time
📊 Static checks / Code style, file formatting, and docs	1m 3s
🍏 iOS / Template (target=template_release)	15m 6s
🍎 macOS / Editor (target=editor, tests=yes)	25m 38s
🤖 Android / Editor (target=editor)	25m 18s
🐧 Linux / Editor w/ Mono (target=editor)	37m 39s
🍎 macOS / Template (target=template_release)	21m 51s
🤖 Android / Template arm32 (target=template_release, arch=arm32)	17m 13s
🐧 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)	39m 53s
🤖 Android / Template arm64 (target=template_release, arch=arm64)	17m 13s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	22m 38s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	32m 48s
🌐 Web / Template w/o threads (target=template_release, threads=no)	23m 22s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	28m 47s
🏁 Windows / Editor (target=editor, tests=yes)	51m 23s
🏁 Windows / Template (target=template_release)	37m 30s
🐧 Linux / Template w/ Mono (target=template_release)	23m 8s
🐧 Linux / Minimal template (target=template_release, everything disabled)	15m 27s
🪲 Godot CPP / Build and test Godot CPP	8m 11s
	7h 24m 8s

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