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

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
             - name: Install dependencies
               run: |
                   sudo apt update
-                  sudo apt install libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev libxext-dev wayland-protocols libwayland-dev libxkbcommon-dev
+                  sudo apt install libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev libxext-dev libwayland-dev libxkbcommon-dev
 
             - name: Configure Null shared library
               run: cmake -B build-null-shared -D GLFW_BUILD_WAYLAND=OFF -D GLFW_BUILD_X11=OFF -D BUILD_SHARED_LIBS=ON