ENH Use FieldValidators for FormField validation #3396

Job	Run time
CI / Generate matrix	12s
CI / Context	1s
CI / 8.3 prf-low mariadb phpunit framework-core	1m 32s
CI / 8.3 mysql80 phpunit framework-core	1m 48s
CI / Check governance	0s
CI / 8.4 mysql84 phpunit framework-core	1m 28s
CI / 8.3 prf-low mariadb phpunit framework-orm	1m 41s
CI / 8.3 mysql80 phpunit framework-orm	1m 32s
CI / 8.4 mysql84 phpunit framework-orm	1m 53s
CI / 8.3 mysql80 phplinting	2m 23s
CI / 8.3 mysql80 phpunit framework-cache-only inmemorycache	1m 7s
CI / Dispatch tag patch release	0s
	13m 37s

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