GeneralUtility::validEmail uses now Egulias\EmailValidator instead of
the method `filter_var` for validating an email address. This allows
more email addresses to be valid.

Resolves: #90370
Releases: master
Change-Id: I29bf4c994d730c789828cdecc247080dd669d9fb
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63235


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Frank Nägler <frank.naegler@typo3.org>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>