Refactor (ci): Use a `job_group_key` to group jobs #143

Job	Run time
build-2-6-20	1m 5s
build-2-6-20	1m 5s
build-2-6-20	1m 5s
build-2-4-6-0	1m 13s
build-2-4-6-0	1m 13s
build-2-4-6-0	1m 13s
build-2-10-7	2m 8s
build-2-10-7	2m 8s
build-2-10-7	2m 8s
build-2-3-0-0	53s
build-2-3-0-0	53s
build-2-3-0-0	53s
build-2-7-17	1m 7s
build-2-7-17	1m 7s
build-2-7-17	1m 7s
build-2-8-19	1m 11s
build-2-8-19	1m 11s
build-2-8-19	1m 11s
build-2-9-18	1m 40s
build-2-9-18	1m 40s
build-2-9-18	1m 40s
build-4-8-0	2m 25s
build-4-8-0	2m 25s
build-4-8-0	2m 25s
build-5-8-0	2m 57s
build-5-8-0	2m 57s
build-5-8-0	9m 14s
build-6-6-0	2m 36s
build-6-6-0	2m 36s
build-6-6-0	2m 36s
build-7-5-0	2m 34s
build-7-5-0	2m 34s
build-7-5-0	5m 45s
test-nogitdiff	15s
test-nogitdiff	15s
test-nogitdiff	15s
build-8-4-0	2m 18s
build-8-4-0	1m 23s
build-8-4-0	9m 0s
publish-draft-release	0s
publish-draft-release	1s
publish-draft-release	0s
update-dockerhub-description	0s
update-dockerhub-description	1s
update-dockerhub-description	0s
update-draft-release	0s
update-draft-release	1s
update-draft-release	0s
	1h 22m 24s

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