Stricter IE vat validation

[VincentLanglet]

Hi @dannyvankooten

Cf https://en.wikipedia.org/wiki/VAT_identification_number#VAT_numbers_by_country

The current check of VTA number for Ireland is too lax

'IE' + 7 digits and one letter, e.g. IE1234567T. Historically, married women used the ID of their husband appended with a 'W', e.g. IE1234567TW. The policy as of 2022 is that every individual has a unique ID.[13]
'IE' + 7 digits and two letters, e.g. IE1234567FA (since January 2013, see [1])
'IE'+one digit, one letter/"+"/"*", 5 digits and one letter (old style, currently being phased out, see [2])

I updated the regex and the tests

[dannyvankooten]

Nice, thank you @VincentLanglet!