[BUGFIX] UriBuilder: Do not skip empty parameters

This is not the job of the uri builder to decide this.
It must simply build an URL from all given parameters.

In general, empty parameters can be intended by a dev.

Resolves: #79835
Releases: master, 7.6
Change-Id: I0ec3e7c41a78b40ecd81e52381f1d744a1e65608
Reviewed-on: https://review.typo3.org/51704


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Johannes Kasberger <johannes.kasberger@reelworx.at>
Tested-by: Johannes Kasberger <johannes.kasberger@reelworx.at>
Reviewed-by: Josef Glatz <josef.glatz@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>