Add `Lua::scope` back #1156

Job	Run time
Rustfmt	14s
Clippy (lua54)	15s
Clippy (lua53)	11s
Build (ubuntu-22.04, stable, lua54)	28s
Clippy (lua52)	11s
Build (ubuntu-22.04, stable, lua53)	27s
Clippy (lua51)	15s
Build (ubuntu-22.04, stable, lua52)	24s
Clippy (luajit)	14s
Build (ubuntu-22.04, stable, lua51)	24s
Clippy (luau)	13s
Clippy (luau-jit)	16s
Build (ubuntu-22.04, stable, luajit)	37s
Build (ubuntu-22.04, stable, luau)	39s
Clippy (luau-vector4)	14s
Build (ubuntu-22.04, stable, luau-jit)	39s
Build (ubuntu-22.04, stable, luau-vector4)	40s
Build (macos-latest, stable, lua54)	41s
Build (macos-latest, stable, lua53)	29s
Build (macos-latest, stable, lua52)	41s
Build (macos-latest, stable, lua51)	27s
Build (macos-latest, stable, luajit)	1s
Build (macos-latest, stable, luau)	1s
Build (macos-latest, stable, luau-jit)	1s
Build (macos-latest, stable, luau-vector4)	38s
Build (windows-latest, stable, lua54)	1s
Build (windows-latest, stable, lua53)	26s
Build (windows-latest, stable, lua52)	27s
Build (windows-latest, stable, lua51)	27s
Build (windows-latest, stable, luajit)	28s
Build (windows-latest, stable, luau)	27s
Build (windows-latest, stable, luau-jit)	27s
Build (windows-latest, stable, luau-vector4)	27s
Cross-compile to armv7-unknown-linux-gnueabihf	0s
Cross-compile to aarch64-apple-darwin	0s
Cross-compile to aarch64-unknown-linux-gnu	0s
Test	0s
Test modules	0s
Test modules on Windows	0s
Test on wasm32-unknown-emscripten	0s
Test with address sanitizer	0s
	12m 30s

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