container: root: test: benchmark/unit: add bitcoin plugin support

- Adds test cases and benchmark for bitcoin's RNG via `dfi`'s `Random`
  * Currently only supports one of bitcoin's RNG's (`FastRandomContext`)

container/src/root/test/common/random.hh

@@ -90,6 +90,18 @@ struct RandomLibsodium_Impl
   using Random = ::dfi::crypto::libsodium::Random;
   Random random;
 };
+
+#ifdef __DFI_PLUGIN_BITCOIN__
+//! \brief Bitcoin random implementation fixture
+//! \since docker-finance 1.1.0
+struct RandomBitcoin_Impl
+{
+ protected:
+  using Random = ::dfi::crypto::bitcoin::Random;
+  Random random;
+};
+#endif
+
 }  // namespace tests
 }  // namespace dfi