mandatory formatting of phone number in store order form does not allow for international phone numbers

### What Happened?

the required phone number format in the order form does not support non-US phone numbers

e.g., it is not possible to enter a valid cell number like xxxx xxx xxxx or with country code like +49 xxx xxx xxxx

please see e.g., the standard E. 164 for phone number format [+][country code][area code][local phone number]

### Steps to Reproduce

1. go to elementary store
2. add something to the card
3. goto cart
4. fillout form
5. try to enter any international phone numer like +49 1234 567 8901

### Expected Behavior

as international shipping seems to be supported, please allow for international phone numbers as well

### OS Version

6.x (Odin)

### Software Version

Latest release (I have run all updates)

### Log Output

_No response_

### Hardware Info

_No response_