[TASK] Use input type "email" in Install-Tool

Using the type "email" for the test section is state of the art and
avoid user errors because the browser checks the syntax before allowing
a submit.

Resolves: #61936
Releases: master
Change-Id: Idfeb7503d933b2758bbd3e7f7b9e20085a4a79ab
Reviewed-on: http://review.typo3.org/33005
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>