Wayland: Remove dependency on wayland-protocols

This brings the latest released versions of all used Wayland protocol
files into this repository, removing the need for the user to arrange
a sufficiently new version of wayland-protocols.

The wayland.xml protocol file was copied from wayland 1.22.0.
The additional protocol files were copied from wayland-protocols 1.32.

Because of how files are moved and renamed inside the wayland-protocols
repository, it will not always be possible to update all our protocol
files from a single release without also potentially updating related
code (acceptable) and prematurely breaking compatibility with
compositors that still only support an earlier incompatible version
(unacceptable).

The macro in src/CMakeLists.txt has been modified to hopefully make it
easier to add new protocol files.  This made it necessary to change the
name of a few of the generated header files.

Closes #2053

src/wl_monitor.c

@@ -130,8 +130,6 @@ static void outputHandleScale(void* userData,
     }
 }
 
-#ifdef WL_OUTPUT_NAME_SINCE_VERSION
-
 void outputHandleName(void* userData, struct wl_output* wl_output, const char* name)
 {
     struct _GLFWmonitor* monitor = userData;
@@ -145,18 +143,14 @@ void outputHandleDescription(void* userData,
 {
 }
 
-#endif // WL_OUTPUT_NAME_SINCE_VERSION
-
 static const struct wl_output_listener outputListener =
 {
     outputHandleGeometry,
     outputHandleMode,
     outputHandleDone,
     outputHandleScale,
-#ifdef WL_OUTPUT_NAME_SINCE_VERSION
     outputHandleName,
     outputHandleDescription,
-#endif
 };
 
 
@@ -173,11 +167,7 @@ void _glfwAddOutputWayland(uint32_t name, uint32_t version)
         return;
     }
 
-#ifdef WL_OUTPUT_NAME_SINCE_VERSION
     version = _glfw_min(version, WL_OUTPUT_NAME_SINCE_VERSION);
-#else
-    version = 2;
-#endif
 
     struct wl_output* output = wl_registry_bind(_glfw.wl.registry,
                                                 name,