add test_missing_signers opt-out

Author: rustopian

program/tests/deactivate.rs

@@ -61,6 +61,7 @@ fn test_deactivate(activate: bool) {
         override_signer: Some(&ctx.withdrawer),
     })
     .checks(&[Check::err(ProgramError::MissingRequiredSignature)])
+    .test_missing_signers(false)
     .execute();
 
     // Deactivate succeeds