[Form] Check for hour/minute/second validity

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9440
| License       | MIT
| Doc PR        | -

This PR checks if hour, minute & second values are valid in the datetime to array transformer (values must be integer if they exists).