💄(react) homogenize form fields colors

Based on the QA feedbacks we figured out that form fields were not all
using the exact same greyscale colors.

packages/react/src/components/Forms/DatePicker/DatePicker.tsx

@@ -77,6 +77,7 @@ export const DatePicker = (props: DatePickerProps) => {
           label: props.label,
           labelAsPlaceholder,
           onFocusChange: setIsFocused,
+          disabled: props.disabled,
         }}
       />
     </DatePickerAux>