See: #1348

---------

Co-authored-by: Barash Asenov <barash.asenov@check24.de>

## Fixes Or Enhances

Although the E164 spec technically would allow for numbers with only one
digit after the country code, we used to expect atleast 7 digits, since
that is what is way more practical.

In fix for E164 to disallow leading 0 in country codes, we lowered said
limit to 1 digit. This broke things for peoples as numbers like `123456`
became valid.

Reverting back to the original limit of 7 digits, is practical, and
probably the expected behavior out of this validator.

Related #1515 

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- [x] Tests exist or have been written that cover this particular
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## Fixes Or Enhances

Fixes #1513 

This PR adds 14 ISO 3166-2 subdivision codes that are currently missing
from the validator. These codes were officially added to the ISO 3166-2
standard between 2014 and 2023.


**Make sure that you've checked the boxes below before you submit PR:**
- [x] Tests exist or have been written that cover this particular
change.

@go-playground/validator-maintainers