Move all files to autotests/server

src/wayland/autotests/server/CMakeLists.txt

+########################################################
+# Test WaylandServerDisplay
+########################################################
+set( testWaylandServerDisplay_SRCS
+        test_display.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/buffer_interface.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/compositor_interface.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/display.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/output_interface.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/seat_interface.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/shell_interface.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/surface_interface.cpp
+    )
+add_executable(testWaylandServerDisplay ${testWaylandServerDisplay_SRCS})
+target_link_libraries( testWaylandServerDisplay Qt5::Test Qt5::Gui Wayland::Server)
+add_test(kwin-testWaylandServerDisplay testWaylandServerDisplay)
+ecm_mark_as_test(testWaylandServerDisplay)
+
+########################################################
+# Test WaylandServerSeat
+########################################################
+set( testWaylandServerSeat_SRCS
+        test_seat.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/buffer_interface.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/compositor_interface.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/display.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/output_interface.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/seat_interface.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/shell_interface.cpp
+        ${KWIN_SOURCE_DIR}/wayland_server/surface_interface.cpp
+    )
+add_executable(testWaylandServerSeat ${testWaylandServerSeat_SRCS})
+target_link_libraries( testWaylandServerSeat Qt5::Test Qt5::Gui Wayland::Server)
+add_test(kwin-testWaylandServerSeat testWaylandServerSeat)
+ecm_mark_as_test(testWaylandServerSeat)