[TASK] Update benchmarks and use proper weights

[1xstj]

Overview

The runtime is using default weights for many pallets, it would be ideal to write benchmarks for these pallets and execute benchmarks to generate weights that make sense for our parachain.

Use runtime benchmarking to ensure that the runtime weights are actually indicative of the resources used by the runtime.

Custom weights
If we need to diverge from benchmarks, make sure that each pallet in the runtime employs the correct weighting system.

Set block weight limit
It is recommended to have a block weight limit (block production time) of 0.5 seconds in the beginning due to uncertainties in block execution time. As the execution time of the network stabilizes the weight limit can be increased to 2 seconds.

Tasks

• Fix currently failing benchmarks ([fix] Update failing benchmarks of dkg-metadata dkg-substrate#317)
• Add benchmarks for external pallets (ORML, etc..) ([feat] Add runtime weights #25)
• Add benchmarks for pallets in protocol-substrate ([fix] Add weights for signature-bridge and anchor-handler protocol-substrate#224)
• Integrate weight templates and generate weight ([feat] Add runtime weights #25)
• Decide on reference machine and calculate weights using reference machine