skip last name check when creating a booking (#22794)

Co-authored-by: Devanshu Sharma <devanshusharma658@gmail.com>

apps/api/v2/src/ee/bookings/2024-04-15/inputs/create-booking.input.ts

@@ -31,12 +31,7 @@ function ValidateBookingName(validationOptions?: ValidationOptions) {
             return value.trim().length > 0;
           }
           if (typeof value === "object" && value !== null) {
-            return (
-              typeof value.firstName === "string" &&
-              typeof value.lastName === "string" &&
-              value.firstName.trim().length > 0 &&
-              value.lastName.trim().length > 0
-            );
+            return typeof value.firstName === "string" && value.firstName.trim().length > 0;
           }
           return false;
         },