benchmarking script doesn't work with polkadot-sdk-v1.11.0

[Roznovjak]

In 1.11.0, heap-pages parameter for the benchmark command has no effect and the default value is used. As a result, cumulus_pallet_parachain_system benchmarks fail and benchmarking.sh script fails when used to benchmark all the pallets.
Possible solutions:

• keep the script as it is and wait for fix of the benchmarking command
• update the script to exclude specified pallets
• use standalone benchmarking binary to benchmark all the pallets (currently the default chain spec is used by this tool and doesn't work for all pallets)