CI: Rewrite check-each-crate in python (#13238)

* CI: Rewrite `check-each-crate` in python

This is a much better readable version of the script and it should also work on Macos and not
siltently fail ;)

* Fix dumb bugs and print everything to stderr

* Don't buffer Python output

* 🤦

* 🤦 🤦

* Use check all until we have more macos runners

* Update scripts/ci/gitlab/check-each-crate.py

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Update scripts/ci/gitlab/pipeline/test.yml

Co-authored-by: Vladimir Istyufeev <vladimir@parity.io>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

substrate/scripts/ci/gitlab/check-each-crate.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+
+# A script that checks each workspace crate 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
+#
+# `check-each-crate.py target_group groups_total`
+#
+# - `target_group`: Integer starting from 1, the group this script should execute.
+# - `groups_total`: Integer starting from 1, total number of groups.
+
+import subprocess, sys
+
+# Get all crates
+output = subprocess.check_output(["cargo", "tree", "--locked", "--workspace", "--depth", "0", "--prefix", "none"])
+
+# Convert the output into a proper list
+crates = []
+for line in output.splitlines():
+	if line != b"":
+		crates.append(line.decode('utf8').split(" ")[0])
+
+# Make the list unique and sorted
+crates = list(set(crates))
+crates.sort()
+
+target_group = int(sys.argv[1]) - 1
+groups_total = int(sys.argv[2])
+
+if len(crates) == 0:
+	print("No crates detected!", file=sys.stderr)
+	sys.exit(1)
+
+print(f"Total crates: {len(crates)}", file=sys.stderr)
+
+crates_per_group = len(crates) // groups_total
+
+# If this is the last runner, we need to take care of crates
+# after the group that we lost because of the integer division.
+if target_group + 1 == groups_total:
+	overflow_crates = len(crates) % groups_total
+else:
+	overflow_crates = 0
+
+print(f"Crates per group: {crates_per_group}", file=sys.stderr)
+
+# Check each crate
+for i in range(0, crates_per_group + overflow_crates):
+	crate = crates_per_group * target_group + i
+
+	print(f"Checking {crates[crate]}", file=sys.stderr)
+
+	res = subprocess.run(["cargo", "check", "--locked", "-p", crates[crate]])
+
+	if res.returncode != 0:
+		sys.exit(1)