chore(ci): update obsolete XCode versions, add iOS 18 and 26

[GitToTheHub]

• XCode 13 and 14 is not available anymore, replaced it with XCode 15
• Added tests for iOS 18 and 26

Platforms affected

Motivation and Context

Description

Testing

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary