Bring back xtask alias #7749

Job	Run time
Doctest	1m 35s
Run `cargo deny check`	4m 33s
Run `cargo deny check advisories`	5m 25s
Clippy cts_runner	1m 5s
Clippy Windows x86_64	4m 18s
Format	19s
Clippy MacOS x86_64	3m 12s
Test Windows x86_64	11m 34s
Test WebAssembly	5m 21s
Test Mac aarch64	1m 29s
Clippy MacOS aarch64	3m 55s
Test Linux x86_64	10m 20s
Clippy IOS aarch64	5m 40s
Clippy Linux x86_64	1m 47s
Clippy Linux aarch64	2m 56s
Clippy Android aarch64	1m 57s
Clippy WebAssembly	2m 1s
Clippy Emscripten	1m 10s
	1h 8m 37s

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