Add validation for cluster name (#8617)

* adding input validation for cluster name

* Adding type to the inputValidtor

* move out const to global space

extensions/resource-deployment/src/interfaces.ts

@@ -153,6 +153,9 @@ export interface FieldInfo {
 	defaultValue?: string;
 	confirmationRequired?: boolean;
 	confirmationLabel?: string;
+	textValidationRequired?: boolean;
+	textValidationRegex?: string;
+	textValidationDescription?: string;
 	min?: number;
 	max?: number;
 	required?: boolean;