[TASK] Implement CompileableInterface for SwitchViewHelper

Allows the SwitchViewHelper to be compiled into cached templates.
Until now using the SwitchViewHelper would result in the template
not being compiled at all. With this change that is no longer the
case.

Releases: master
Resolves: #66718
Change-Id: I5c34c1f770ec73c0296054905b65301af9de7c1b
Reviewed-on: http://review.typo3.org/39170


Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>