Add CI platform configurations for the qmake2cmake repo

Adds Linux RHEL and macOS desktop platforms to run the qmake2cmake
tests and linters, as well one more configuration for the
license check.

Ubuntu doesn't quite work out of the box. Same for Windows.
They will be added later.

Change-Id: Id37d2ca6512ea8b7564dfa05b4bd6c49cadf96a5
Reviewed-by: Toni Saario <toni.saario@qt.io>

coin/platform_configs/qmake2cmake.yaml

@@ -0,0 +1,15 @@
+Version: 2
+Module only: True
+Configurations:
+-
+    Template: 'qtci-macos-12-x86_64-102'
+    Compiler: 'Clang'
+    Features: ['DisableTests']
+-
+    Template: 'qtci-linux-RHEL-8.4-x86_64-50'
+    Compiler: 'GCC'
+    Features: ['DisableTests']
+-
+    Template: 'qtci-linux-Ubuntu-20.04-x86_64-50'
+    Compiler: 'GCC'
+    Features: ['TestOnly', 'LicenseCheck', 'UseLegacyInstructions']