[Security Solution][Detection Engine] fixes rule preview works for form's invalid state (#173930)#213801

denar50 merged 2 commits intomainelastic/kibana:mainfrom

173930-allow-rule-preview-when-define-step-form-is-validelastic/kibana:173930-allow-rule-preview-when-define-step-form-is-validCopy head branch name to clipboard