[FileAccess] Implement `resize` method. #27541

Job	Run time
📊 Static checks / Code style, file formatting, and docs	3m 40s
🍏 iOS / Template (target=template_release)	23m 56s
🐧 Linux / Editor w/ Mono (target=editor)	31m 51s
🐧 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 0s
🤖 Android / Template (target=template_release)	23m 28s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	28m 33s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	25m 31s
🐧 Linux / Template w/ Mono (target=template_release)	18m 29s
🍎 macOS / Editor (target=editor, tests=yes)	21m 46s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	17m 34s
🍎 macOS / Template (target=template_release)	13m 30s
🐧 Linux / Minimal template (target=template_release, everything disabled)	12m 28s
🌐 Web / Template w/o threads (target=template_release, threads=no)	18m 12s
🏁 Windows / Editor (target=editor, tests=yes)	37m 15s
🏁 Windows / Template (target=template_release)	25m 5s
🪲 Godot CPP / Build and test Godot CPP	6m 57s
	5h 38m 15s

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