[cmake, tools] update CPMUtil and add support for CPMUtil bundled Qt, module updates, cleanups (#3289)

Support for bundled Qt, not through aqtinstall but rather my CI. Multimedia is
implemented too, works on both Windows and Linux, though we don't
actually use it so it doesn't really matter. Contains Declarative and all that so the Quick frontend will work once it becomes a thing.

Some options have changed, notably w.r.t LTO and faster
linker, which are now handled directly in the modules.

CPMUtil also has support for custom dirs (`PackageName_CUSTOM_DIR`) now. Probably most useful for adding external fragment shaders and whatnot.

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3289

externals/CMakeLists.txt

@@ -25,7 +25,7 @@ set(BUILD_SHARED_LIBS OFF)
 # Skip install rules for all externals
 set_directory_properties(PROPERTIES EXCLUDE_FROM_ALL ON)
 
-# Xbyak (also used by Dynarmic, so needs to be added first)
+# Xbyak
 if (ARCHITECTURE_x86 OR ARCHITECTURE_x86_64)
     if (PLATFORM_SUN OR PLATFORM_OPENBSD OR PLATFORM_NETBSD OR PLATFORM_DRAGONFLY)
         AddJsonPackage(xbyak_sun)
@@ -34,11 +34,19 @@ if (ARCHITECTURE_x86 OR ARCHITECTURE_x86_64)
     endif()
 endif()
 
-# Oaknut (also used by Dynarmic, so needs to be added first)
+# Oaknut
 if (ARCHITECTURE_arm64 OR DYNARMIC_TESTS)
     AddJsonPackage(oaknut)
 endif()
 
+# biscuit
+if (ARCHITECTURE_riscv64)
+    AddJsonPackage(biscuit)
+endif()
+
+# mcl
+AddJsonPackage(mcl)
+
 # enet
 AddJsonPackage(enet)