Mana Calculator: Exclude a validator if user type is `validator` #1407

Job	Run time
publish (cli) / check	6s
publish (core) / check	6s
publish (plugin-tutorial) / check	8s
publish (cli) / test	44s
publish (plugin-tutorial) / test	47s
publish (plugin-tutorial) / publish	0s
publish (cli) / publish	0s
publish (core) / test	39s
publish (core) / publish	0s
	2m 30s

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