When formatting provided site name, only remove .tld if it's at the end

[ErikDohmen]

(copied from Issue #1298 for context):

Description:
TL;DR: If your site name contains your TLD (e.g. if your TLD is .test and your site name contains .test) it will be removed inappropriately.

In line with our regular site setup we have the same locally with valet:

• portal.test-work.test
• welcome.test-work.test

The moment it goes wrong is when I try to use the isolate option. Then I get an error: portal-work isn't found as site name. That is correct as it is indeed portal.test-work. The problem seems to be that .test is removed not just at the end, but just as it is found in the site name.

Searches on internet doesn't bring any solutions to the table.

Steps To Reproduce:

• add a link to your project with a specific site name in line with ours e.g. portal.test-work
• try to isolate the site with any php version
• you should get the error that the site name isn't found in the list of sites

Solutions in this PR:

• Check if tld is at the end of the site name and, if so, remove it
• Add corresponding test

Fixes #1295, Fixes #1298.

[mattstauffer]

Just one small refactor and then this is good to go!

[ErikDohmen]

@mattstauffer, thanks for the suggestion. I added it and added one more missing ) in your code suggestion to make it work.

[mattstauffer]

Thanks @ErikDohmen!