[FEATURE] Add TemplateRootPaths support to cObject FLUIDTEMPLATE

cObject FLUIDTEMPLATE is extended with `templateRootPaths` and
`templateName`. Now you can set a template name and when rendering the
template this name is used together with the set format to find the
template in the given templateRootPaths with the same fallback logic as
layoutRootPath and partialRootPath.

Resolves: #66111
Releases: master
Change-Id: I30d7fa63f63f818b5da31194bad1dccce95929e2
Reviewed-on: http://review.typo3.org/38331


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>