Add token for "Street address lines 1/2/3 combined"

Reworked to apply to latest 8.x-1.x, fixed few coding standard issues.
Renamed CountryNameTokenTest to AddressTokenTest and extended it to contain test case for new token

Good idea!

Needs a reroll for 2.0.x.

We also need to add address_line3 the same way we added address_line2.

I have created a patch for the 2.0.x.

I have adapted this patch for the 2.0.x branch, which includes support for an additional third address line.

Changes Made:
1. Renamed the token from 'address_lines_both' to 'address_lines_combined' to better reflect its functionality, as it now combines up to three address lines.
2. Updated the logic in address.tokens.inc to handle the third address line. The token now correctly concatenates the available address lines, separating them with commas as appropriate.
3. Manually tested the new token with the Meta Tag module. I used the [node:field_address:address_lines_combined] token in the default meta description for content. The token correctly outputs:

• Just the first line when only the first address line is present.
• The first and second lines, separated by a comma, when both are present.
• All three lines, each separated by a comma, when all are present.
• No additional text in the meta description when the address field is empty.

Thanks!

This is now 2.1.0 material, so bumping the version.