Link against KPIMTextEdit explicitly where it's used

This currently relies on KIdentityManagement pulling this in transitively,
but that's going to change.

autotests/CMakeLists.txt

@@ -69,6 +69,7 @@ add_akonadi_isolated_test(
   KF5::AkonadiWidgets
   KF5::Completion
   KF5::IncidenceEditor
+  KF5::PimTextEdit
   KF5::Libkdepim
   KF5::WidgetsAddons
 )

src/CMakeLists.txt

@@ -153,6 +153,7 @@ PUBLIC
   KF5::EventViews
 PRIVATE
   KGantt              # For FreeBusy Editor
+  KF5::PimTextEdit
   KF5::Codecs
   KF5::Ldap
   KF5::AkonadiWidgets