* check all crates individually
It's relevant to check workspace crates individually because otherwise their compilation problems
due to feature misconfigurations won't be caught, as exemplified by
https://github.com/paritytech/substrate/issues/12705
* adapt to lack of multiple macos runners
https://github.com/paritytech/substrate/pull/12709#discussion_r1022868752
* fix cancel-pipeline-cargo-check-each-crate-macos
* fix cargo-check-each-crate-macos again
* time command execution
* fix YAML anchors
* add explanation for rounding division
* ensure the minimum of one crate per group
* collect artifacts for pipeline stopper
* revert hardcoded crates_per_group
* re-add crates_per_group=1
João Paulo Silva de Souza