ci: Refactor workflows layout #3

Job	Run time
check_clippy	3m 51s
check_docs	3m 30s
build_all_features	5m 13s
build_all_platforms (ubuntu-latest)	2m 40s
build_default_features (ubuntu-latest)	1m 8s
build_all_platforms (macos-latest)	5m 53s
build_default_features (macos-latest)	1m 58s
build_all_platforms (windows-latest)	5m 21s
build_default_features (windows-latest)	2m 22s
build_under_wasm	1m 0s
check_msrv	3m 21s
unit	3m 29s
	39m 46s

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