[cmake] refactor: CPM over vcpkg (#250)

Completely replaces vcpkg with CPM for all "system" dependencies. Primarily needed for Android and Windows. Also uses my OpenSSL CI for those two platforms.

In theory, improves configure and build time by a LOT and makes things much easier to manage

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/250
Reviewed-by: Lizzie <lizzie@eden-emu.dev>

src/dynarmic/externals/CMakeLists.txt

@@ -95,6 +95,7 @@ AddPackage(
 
 # TODO(crueter): maybe it's just Gentoo but zydis system package really sucks
 if ("x86_64" IN_LIST ARCHITECTURE)
+    # TODO(crueter): system zycore doesn't work with zydis
     AddPackage(
         NAME Zycore
         REPO "zyantific/zycore-c"
@@ -102,8 +103,8 @@ if ("x86_64" IN_LIST ARCHITECTURE)
         HASH 15aa399f39713e042c4345bc3175c82f14dca849fde2a21d4f591f62c43e227b70d868d8bb86beb5f4eb68b1d6bd3792cdd638acf89009e787e3d10ee7401924
         OPTIONS
             "CMAKE_DISABLE_FIND_PACKAGE_Doxygen ON"
-        # BUNDLED_PACKAGE ${DYNARMIC_USE_BUNDLED_EXTERNALS}
         EXCLUDE_FROM_ALL ON
+        SYSTEM_PACKAGE OFF
     )
 
     AddPackage(
@@ -112,13 +113,13 @@ if ("x86_64" IN_LIST ARCHITECTURE)
         REPO "zyantific/zydis"
         SHA c2d2bab025
         HASH 7b48f213ff7aab2926f8c9c65195959143bebbfb2b9a25051ffd8b8b0f1baf1670d9739781de674577d955925f91ac89376e16b476a03828c84e2fd765d45020
+        FIND_PACKAGE_ARGUMENTS "CONFIG"
         OPTIONS
             "ZYDIS_BUILD_TOOLS OFF"
             "ZYDIS_BUILD_EXAMPLES OFF"
             "ZYDIS_BUILD_DOXYGEN OFF"
-            "ZYAN_ZYCORE_PATH ${Zycore_SOURCE_DIR}"
+            "ZYAN_SYSTEM_ZYCORE ON"
             "CMAKE_DISABLE_FIND_PACKAGE_Doxygen ON"
-        # BUNDLED_PACKAGE ${DYNARMIC_USE_BUNDLED_EXTERNALS}
         EXCLUDE_FROM_ALL ON
     )
 endif()