feat: add Google Metadata support and TDX container test

- Introduced `google-metadata` binary for reading GCP instance attributes.
- Added TDX container test with new `container-test-tdx` package.
- Updated Nix workflow and deployment scripts for Google Metadata integration.
- Bumped `anyhow` to 1.0.95 and updated Cargo.lock.

Signed-off-by: Harald Hoyer <harald@matterlabs.dev>

shells/teepot/default.nix

@@ -6,10 +6,9 @@
 , teepot
 , nixsgx
 , stdenv
-, teepotCrate
 }:
 let
-  toolchain_with_src = (teepotCrate.rustVersion.override {
+  toolchain_with_src = (teepot.teepot.passthru.rustVersion.override {
     extensions = [ "rustfmt" "clippy" "rust-src" ];
   });
 in
@@ -19,7 +18,7 @@ mkShell {
   nativeBuildInputs = with pkgs; [
     toolchain_with_src
     pkg-config
-    teepotCrate.rustPlatform.bindgenHook
+    teepot.teepot.passthru.rustPlatform.bindgenHook
   ];
 
   packages = with pkgs; [