* expose a allowSavedCards option to JS on stripe settings data
* hide 'save my card' checkbox if merchant disables saved cards
* use stripe allowSavedCards option to control "Save my card" checkbox
* (linter) remove unnecessary useEffect dependency:
- stripePromise const is defined outside component, so hook doesn't
depend on it
* clarify comment about saved cards and supports( tokenization )
* correct comment about save card merchant option - doesn't affect paying with previously saved payment methods
* use true boolean value for stripe allow saved cards setting:
previously was using woo option `yes no` style, other JS settings all use true bool
Co-authored-by: Darren Ethier <darren@roughsmootheng.in>
* fix client side check now `allowSavedCards` is true boolean
Co-authored-by: Darren Ethier <darren@roughsmootheng.in>