iOS: Build a subset of tests when targeting iOS

Currently will only build tests/auto/cmake projects in qtbase.
More work is needed for the other repos.

Pick-to: 6.2
Task-number: QTBUG-95839
Change-Id: Ie1aa6deb202c9b84ce0c14b0f851f38a3a71fe7b
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

coin/platform_configs/ios-tests.yaml

@@ -0,0 +1,12 @@
+Version: 2
+Configurations:
+-
+    Id: "ios-tests-target"
+    Template: 'qtci-macos-10.14-x86_64'
+    Target os: 'IOS_ANY'
+    Target arch: 'arm64'
+    Compiler: 'Clang'
+    Target compiler: 'Clang'
+    Platform dependency: 'macos-latest-xcode-universal-packaging-build'
+    Features: ['Sccache', 'DebugAndRelease', 'MinimalStaticTests']
+    Environment variables: ['TARGET_CONFIGURE_ARGS=-G"Ninja Multi-Config" -DCMAKE_CONFIGURATION_TYPES="Release;Debug" -DQT_BUILD_EXAMPLES=OFF -DCMAKE_SYSTEM_NAME=iOS', 'NON_QTBASE_TARGET_CONFIGURE_ARGS=']

coin/platform_configs/qtbase.yaml

@@ -3,7 +3,8 @@ Include: [
     cmake_platforms.yaml,
     cmake_platforms_static_tests.yaml,
     macos-developer-build-tests.yaml,
-    integrity.yaml
+    integrity.yaml,
+    ios-tests.yaml
 ]
 Configurations:
 -