Add Validation for landline numbers in Phone Number field in Patient Registration

[siddnikh]

The Phone Number validator rejects landline numbers. Even though it accepts the "0" part of the number, it expects one of 4,5,6,7,8 or 9 to be the next digit. STD codes don't always start with these digits, hence we need to change the regex for this.

Follow up for: ohcnetwork/care_fe#5776