[TASK] Streamline indexed_search template files

For a more streamlined rendering this patch adds nessesary html tags
with fluid namespaces to all indexed_search templates, unifies indention
and adds an empty space before closing bracket of self-closing tags.

Resolves: #80392
Releases: master
Change-Id: Ia6bc46c8fb602b4f3592094ad963691bbf412d7d
Reviewed-on: https://review.typo3.org/52119


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>