formatPrice doesn't work with custom decimal separator

[dinhtungdu]

To reproduce

Steps to reproduce the behavior:

1. Go to WooCommerce > Settings.
2. Change decimal separator to ,.
3. Change decimal separator to ..
4. Save changes.
5. Add a block using formatPrice such as Mini Cart block to the page.
6. Add some products to cart, see the price was formatted using . as the decimal separator.

Expected behavior

A clear and concise description of what you expected to happen.
The formatted price should respect the store settings.

Screenshots

Environment

WordPress (please complete the following information):

• Core version: 5.8.1
• Gutenberg version (if installed): 2d6a363
• WooCommerce version: 5.7.1
• WooCommerce Blocks version: 6.2.0-dev
• Site language: English
• Any other plugins installed: WooCommerce Stripe Gateway 5.5.0