[BUGFIX] Use "noreferrer" instead of "noopener noreferrer"

Various patches introduced a feature to not send the referer
nor the opener information to external links.

However, just because others CMS do it this way,
one should carefully consider WHAT THESE THINGS DO.

So, adding "noreferrer" implicitly includes "noopener".
What this means is that we can save a lot of bytes, save the
environment by producing less bytes and sending them over the wire.

References:
- https://www.w3.org/TR/2011/WD-html5-20110113/links.html#link-type-noreferrer
- https://web.dev/external-anchors-use-rel-noopener/
- https://html.spec.whatwg.org/multipage/links.html#link-type-noreferrer

Relates: #78488
Relates: #89044
Resolves: #89757
Releases: master
Change-Id: Ia366169cd30da23f988bae04175fdaa18be418b2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62421


Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Susanne Moog <look@susi.dev>