Don't remove invalid transactions when skipping. (#5121)

* Don't remove invalid transactions when skipping.

* Use a special kind of extrinsic instead of arbitrary limit.

* Fix txpool tests.

* Attempt to create more blocks.

* Bump lock

Co-authored-by: Gavin Wood <github@gavwood.com>
Co-authored-by: Nikolay Volf <nikvolf@gmail.com>

substrate/bin/node/executor/benches/bench.rs

@@ -166,7 +166,7 @@ fn bench_execute_block(c: &mut Criterion) {
 			// Get the runtime version to initialize the runtimes cache.
 			{
 				let mut test_ext = new_test_ext(&genesis_config);
-				executor.runtime_version(&mut test_ext.ext());
+				executor.runtime_version(&mut test_ext.ext()).unwrap();
 			}
 
 			let blocks = test_blocks(&genesis_config, &executor);