Re-enable documentation testing in CI

Commit 204ea530 disabled documentation testing, as 'TestDocs'
is a testing-only step, and it was combined with 'DoNotRunTests'.

Move the feature under the new test-only configurations.

Pick-to: 6.6 6.5
Change-Id: Ie458495904b102fa50bc18ea39167ecc89b7c03b
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

coin/platform_configs/cmake_platforms.yaml

@@ -12,7 +12,7 @@ Configurations:
     Id: 'ubuntu-22.04-documentation'
     Template: 'qtci-linux-Ubuntu-22.04-x86_64-51'
     Compiler: 'GCC'
-    Features: ['Sccache', 'Documentation', 'TestDocs', 'UseConfigure', 'DoNotRunTests']
+    Features: ['Sccache', 'Documentation', 'UseConfigure', 'DoNotRunTests']
     Configure arguments: '-make examples -developer-build -c++std c++20 -linker gold -no-warnings-are-errors -qtlibinfix TestInfix -qtnamespace TestNamespace'
     Environment variables: ['NON_QTBASE_CMAKE_ARGS=-DFFMPEG_DIR={{.Env.FFMPEG_DIR}}']
 -
@@ -30,7 +30,7 @@ Configurations:
     Id: 'ubuntu-22.04-documentation-x11-tests'
     Template: 'qtci-linux-Ubuntu-22.04-x86_64-51'
     Compiler: 'GCC'
-    Features: ['Sccache', 'TestOnly']
+    Features: ['Sccache', 'TestDocs', 'TestOnly']
     Platform dependency: 'ubuntu-22.04-documentation'
 -
     Id: 'ubuntu-22.04-x11-tests'

coin/platform_configs/qtwayland.yaml

@@ -8,7 +8,7 @@ Configurations:
     Id: 'ubuntu-22.04-documentation-wayland-tests'
     Template: 'qtci-linux-Ubuntu-22.04-x86_64-50'
     Compiler: 'GCC'
-    Features: ['Sccache', 'TestOnly', 'RunDependencyTests', 'InsignificantTests']
+    Features: ['Sccache', 'TestDocs', 'TestOnly', 'RunDependencyTests', 'InsignificantTests']
     Platform dependency: 'ubuntu-22.04-documentation'
 -
     Id: 'ubuntu-22.04-wayland-tests'