fix optimizations not applied in solc-standard-json mode

optimization options are applied when using the etherscan way but they don't apply
in case we fetch the source code manually and run crytic-compile on it.
By appending the optimization to the input json, they are now applied as for the
etherscan platform.

Author: clems4ever

crytic_compile/platform/solc_standard_json.py

@@ -407,6 +407,12 @@ def compile(self, crytic_compile: "CryticCompile", **kwargs: Any) -> None:
             optimized=is_optimized(solc_arguments),
         )
 
+        add_optimization(
+            self._json,
+            compilation_unit.compiler_version.optimized,
+            compilation_unit.compiler_version.optimize_runs,
+        )
+
         # Add all remappings
         if solc_remaps:
             if isinstance(solc_remaps, str):