[BUGFIX] Assign resolved Request in TemplateViewHelper

[christophlehmann]

With this, for example the f:link.action() ViewHelper can be used in the rendered template

Resolves: #1902

[NamelessCoder]

Thanks for the patch @christophlehmann - I should note that this will probably only affect TYPO3v12 since older versions do not have the setRequest method on View classes. But that's good enough for me since nobody else has reported this as a problem and I'm sure you already use v12 (since otherwise, your change would have triggered a fatal error).