coin: switch builds to scarthgap

Drop master and mickledore builds from testing. Master is now
future 'styhead' which is no longer supported with 6.5 series.
Mickledore is EOL, no need to test againt that anymore.

Change-Id: I603b9777cb147c0285b8f26e34a730d36b45490b
Reviewed-by: Mikko Gronoff <mikko.gronoff@qt.io>

README.md

@@ -22,9 +22,9 @@ the LAYERSERIES_COMPAT (c).
 
 | Yocto \ Qt | 6.5 | 6.4 | 6.3 | 6.2 |
 | ---------- |:---:|:---:|:---:|:---:|
-| master     |  x  |     |     |     |
+| scarthgap  |  x  |     |     |     |
 | nanbield   |  x  |     |     |     |
-| mickledore |  x  |  x  |     |     |
+| mickledore |  c  |  x  |     |     |
 | langdale   |  c  |  x  |     |     |
 | kirkstone  |  x  |  x  |  x  |  x  |
 | honister   |  c  |  c  |  x  |  x  |

coin/module_config.yaml

@@ -17,7 +17,7 @@ machine_type:
 #
 #           [target1]       [target2]   [target3]       [target4]       [target5]
 # [machine] qemuarm64       qemux86     qemuarm         qemux86-64      qemuarm64
-# [yocto]   nanbield        master      mickledore      dunfell         kirkstone
+# [yocto]   nanbield        scarthgap   scarthgap       dunfell         kirkstone
 # [X11]     no              no          yes             yes             no
 # [mingw]   no              yes         no              no              no
 # [static]  no              no          no              no              yes
@@ -47,7 +47,7 @@ target2: &target2
       variableValue: qemux86
     - type: EnvironmentVariable
       variableName: MANIFEST
-      variableValue: master.xml
+      variableValue: scarthgap.xml
     - type: EnvironmentVariable
       variableName: TEST_CONFIGS
       variableValue: ci configs wayland mingw no-webengine
@@ -63,7 +63,7 @@ target3: &target3
       variableValue: qemuarm
     - type: EnvironmentVariable
       variableName: MANIFEST
-      variableValue: mickledore.xml
+      variableValue: scarthgap.xml
     - type: EnvironmentVariable
       variableName: TEST_CONFIGS
       variableValue: ci configs