Universal builds for Android armv8 and compatibility with older compilers

- We add a new path for supporting universal builds without #embed . `xxd` causes the compiler to run out of memory, so instead we embed it as a string literal created at compile time.
    - This file is created in `net.sh`, and only if `--embed-dir` isn't supported + we are doing a universal build.
    - This was necessary because Android NDK seems to not support embed, idk why
- A couple other Makefile tweaks were necessary for the Android path.
- While we're at it, remove the non-universal arm64 windows and android binaries.

closes https://github.com/official-stockfish/Stockfish/pull/6827

No functional change

.github/ci/arm_matrix.json

@@ -21,16 +21,10 @@
       "archive_ext": "tar"
     }
   ],
-  "binaries": ["armv8-dotprod", "armv8", "armv7", "armv7-neon"],
+  "binaries": ["armv8-universal", "armv7", "armv7-neon"],
   "exclude": [
     {
-      "binaries": "armv8-dotprod",
-      "config": {
-        "compiler": "armv7a-linux-androideabi29-clang++"
-      }
-    },
-    {
-      "binaries": "armv8",
+      "binaries": "armv8-universal",
       "config": {
         "compiler": "armv7a-linux-androideabi29-clang++"
       }

.github/ci/windows_arm_matrix.json

@@ -1,34 +0,0 @@
-{
-  "include": [
-    {
-      "config": {
-        "name": "Windows 11 Mingw-w64 Clang arm64",
-        "os": "windows-11-arm",
-        "simple_name": "windows",
-        "compiler": "clang++",
-        "comp": "clang",
-        "msys_sys": "clangarm64",
-        "msys_env": "clang-aarch64-clang",
-        "shell": "msys2 {0}",
-        "ext": ".exe",
-        "archive_ext": "zip"
-      },
-      "binaries": "armv8"
-    },
-    {
-      "config": {
-        "name": "Windows 11 Mingw-w64 Clang arm64",
-        "os": "windows-11-arm",
-        "simple_name": "windows",
-        "compiler": "clang++",
-        "comp": "clang",
-        "msys_sys": "clangarm64",
-        "msys_env": "clang-aarch64-clang",
-        "shell": "msys2 {0}",
-        "ext": ".exe",
-        "archive_ext": "zip"
-      },
-      "binaries": "armv8-dotprod"
-    }
-  ]
-}