fix(react,angular): Prevent double form validation errors

[Ehesp]

BB-10

Clicking submit with no field values shows a double error (Password should be at least 8 characters, Password should be at least 8 characters)

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Since we had both onBlur and onSubmit validation checks, it doubled up on errors when the form was empty and submitted.

Confirmed that when a form is submitted, it re-runs all validators anyway, thus making the onSubmit validator redundant and can be removed.