[BUGFIX] ext:install Correct exception class inheritance

Install\Controller\Exception\Redirect and RedirectLoopException
should extend from Install\Controller\Exception.

Change-Id: Ic1124a7ba51617c7eec086603126080e33d5c2e5
Resolves: #52757
Releases: 6.2
Reviewed-on: https://review.typo3.org/24704
Reviewed-by: Oliver Klee
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn