Co #11456: Match statement fallthrough for `benchmark` commands (#1350)

* Add default error for unsupported benchmarking command

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Same for the parachain-template...

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* cargo update -p sp-io

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* cargo update -p polkadot-primitives

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>