Add support for Transform2D/3D in lerp() #83

Job	Run time
📊 Static checks / Code style, file formatting, and docs	29s
🍏 iOS / Template (target=template_release)	8m 38s
🤖 Android / Editor (target=editor)	21m 44s
🐧 Linux / Editor w/ Mono (target=editor)	35m 33s
🍎 macOS / Editor (target=editor, tests=yes)	25m 37s
🤖 Android / Template arm32 (target=template_release, arch=arm32)	14m 7s
🐧 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 51s
🍎 macOS / Template (target=template_release)	18m 19s
🤖 Android / Template arm64 (target=template_release, arch=arm64)	14m 31s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	30m 9s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	22m 14s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	27m 27s
🌐 Web / Template w/o threads (target=template_release, threads=no)	23m 2s
🐧 Linux / Template w/ Mono (target=template_release)	22m 29s
🏁 Windows / Editor (target=editor, tests=yes)	44m 1s
🐧 Linux / Minimal template (target=template_release, everything disabled)	14m 58s
🏁 Windows / Editor w/ clang-cl (target=editor, tests=yes, use_llvm=yes)	36m 53s
🏁 Windows / Template (target=template_release)	31m 38s
🪲 Godot CPP / Build and test Godot CPP	8m 10s
	7h 19m 50s

Provide feedback