ci: Merge CI files into a single one #10

Job	Run time
Check lib (x86_64-unknown-linux-gnu)	1m 39s
Check lib (aarch64-unknown-linux-gnu)	2m 49s
Check lib (armv7-unknown-linux-gnueabihf)	3m 24s
Clippy (x86_64-unknown-linux-gnu)	1m 8s
Clippy (aarch64-unknown-linux-gnu)	6m 20s
Clippy (armv7-unknown-linux-gnueabihf)	2m 15s
Check (x86_64-apple-darwin)	5m 14s
Check (x86_64-unknown-linux-gnu)	2m 55s
Check (x86_64-unknown-linux-musl)	3m 51s
Check (x86_64-pc-windows-msvc)	9m 52s
Check (aarch64-unknown-linux-gnu)	4m 17s
Check (armv7-unknown-linux-gnueabihf)	4m 53s
Check MSRV (x86_64-unknown-linux-gnu)	6m 20s
Check MSRV (aarch64-unknown-linux-gnu)	8m 51s
Check MSRV (armv7-unknown-linux-gnueabihf)	7m 22s
Rustfmt	23s
Unit Tests (x86_64-unknown-linux-gnu)	2m 25s
Unit Tests (aarch64-unknown-linux-gnu)	3m 17s
Unit Tests (armv7-unknown-linux-gnueabihf)	3m 39s
	1h 20m 54s

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