iOS: Make default build static again

This is a revert of the default change to -shared in 4c26b48633,
which was landed without dependent changes like
https://codereview.qt-project.org/#/c/160747/ being landed first,
breaking the build for people building with the default configure
arguments.

Change-Id: I66eba76ca681ccf9b2ee54fa16b3e08888ae2fb4
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

configure.json

@@ -462,7 +462,7 @@
     "features": {
         "shared": {
             "label": "Building shared libraries",
-            "condition": "!config.integrity",
+            "condition": "!config.uikit && !config.integrity",
             "output": [
                 "shared",
                 "publicFeature",