[BUGFIX] Switch ViewHelper restored for safe deprecation

This change restores the previous f:switch and f:case
ViewHelpers. Once deprecation period for f:case argument
"default" is over both classes can be safely deleted.

Change-Id: Ie0d79ef69d145e851f4f27187696a5a5297b3a80
Resolves: #73197
Releases: master
Reviewed-on: https://review.typo3.org/46548


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>