cmd/evm: adds ability to run individual state test file (#14998)

* cmd/evm: adds ability to run individual state test file

* cmd/evm: Fix statetest runner to be more json friendly

* cmd/evm, tests: minor polishes, dump state on fail

cmd/evm/main.go

@@ -143,6 +143,7 @@ func init() {
 		compileCommand,
 		disasmCommand,
 		runCommand,
+		stateTestCommand,
 	}
 }