Add code action to do string interpolation #8540

Job	Run time
test-wasm	1m 27s
test (stable, x86_64-unknown-linux-gnu)	4m 59s
rustfmt	13s
test (stable, x86_64-unknown-linux-musl)	6m 34s
lint-build	2m 12s
test (stable, aarch64-unknown-linux-gnu)	3m 25s
validate	17s
test (stable, aarch64-unknown-linux-musl)	4m 6s
test (stable, x86_64-apple-darwin)	8m 59s
test (stable, x86_64-pc-windows-msvc)	6m 54s
test (stable, aarch64-apple-darwin, macos-latest, arm64, cargo, true)	7m 26s
test-projects	1m 50s
	48m 22s

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