Check all crates (#12709)

* 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

substrate/scripts/ci/gitlab/pipeline/build.yml

@@ -90,9 +90,6 @@ build-linux-substrate:
   variables:
     # this variable gets overriden by "rusty-cachier environment inject", use the value as default
     CARGO_TARGET_DIR:              "$CI_PROJECT_DIR/target"
-  needs:
-    - job:                         cargo-check-subkey
-      artifacts:                   false
   before_script:
     - mkdir -p ./artifacts/subkey
     - !reference [.rusty-cachier, before_script]