[TASK] Make hreflang generator use PSR7 interface

Use the Uri class to check if a host is given in the url
to determine if an absolute url should be generated.

Resolves: #86253
Releases: master
Change-Id: Ib84d391b0564f29352eda93a814f5d9b46696f37
Reviewed-on: https://review.typo3.org/58274


Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Richard Haeser <richard@maxserv.com>
Tested-by: Richard Haeser <richard@maxserv.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>