Add workflow stage to run checks for all features #12

Job	Run time
No features	2m 31s
All features	3m 38s
Clippy	1m 53s
Formatting	13s
Default features	3m 34s
Feature combos (sidekiq)	2m 37s
Feature combos (db-sql)	3m 29s
Feature combos (open-api)	2m 41s
Feature combos (sidekiq,db-sql)	3m 39s
Feature combos (sidekiq,open-api)	3m 3s
Feature combos (db-sql,open-api)	3m 18s
	30m 36s

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