build: Search for wayland client libs only when building tests

CMakeLists.txt

@@ -46,10 +46,6 @@ find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS
     UiTools
     Widgets
 )
-find_package(Qt6 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS WaylandClient ShaderTools)
-if (Qt6WaylandClient_VERSION VERSION_LESS "6.4.1") # TODO Plasma 6: Drop once minimum Qt version is 6.4.1+
-    include(Qt6WaylandClientMacrosKde)
-endif()
 
 find_package(Qt${QT_MAJOR_VERSION}Test ${QT_MIN_VERSION} CONFIG QUIET)
 set_package_properties(Qt${QT_MAJOR_VERSION}Test PROPERTIES
@@ -61,6 +57,14 @@ if (NOT Qt${QT_MAJOR_VERSION}Test_FOUND)
     set(BUILD_TESTING OFF CACHE BOOL "Build the testing tree.")
 endif()
 
+if (BUILD_TESTING)
+    find_package(Qt6 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS WaylandClient)
+    if (Qt6WaylandClient_VERSION VERSION_LESS "6.4.1") # TODO Plasma 6: Drop once minimum Qt version is 6.4.1+
+        include(Qt6WaylandClientMacrosKde)
+    endif()
+    find_package(Wayland REQUIRED COMPONENTS Client)
+endif()
+
 # required frameworks by Core
 find_package(KF6 ${KF6_MIN_VERSION} REQUIRED COMPONENTS
     Auth
@@ -430,8 +434,6 @@ add_subdirectory(data)
 add_subdirectory(src)
 
 if (BUILD_TESTING)
-    find_package(Wayland REQUIRED COMPONENTS Client)
-
     add_subdirectory(autotests)
     add_subdirectory(tests)
 endif()