Add benchmarking to rococo; Remove weights from runtime_parachains (#3914)

* Add benchmarking to rococo; Remove weights from runtime_parachains

* cargo run --quiet --release --features runtime-benchmarks -- benchmark --chain=rococo-dev --steps=50 --repeat=20 --pallet=runtime_parachains::paras --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./runtime/rococo/src/weights/runtime_parachains_paras.rs --header=./file_header.txt

* Impl TestWeightInfo for Paras and Configuration

* fmt

* cargo run --quiet --release --features runtime-benchmarks -- benchmark --chain=rococo-dev --steps=50 --repeat=20 --pallet=runtime_parachains::configuration --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./runtime/rococo/src/weights/runtime_parachains_configuration.rs --header=./file_header.txt

* Fix CI complaint: error: unused variable: `c`

* polkadot-runtime-common & polkadot-test-runtime compile

* xcm-simulator compile

* change TestWeightInfo to max_block

* cargo run --quiet --release --features runtime-benchmarks -- benchmark --chain=rococo-dev --steps=50 --repeat=20 --pallet=runtime_parachains::paras --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./runtime/rococo/src/weights/runtime_parachains_paras.rs --header=./file_header.txt

* ordering

* cargo run --quiet --release --features runtime-benchmarks -- benchmark --chain=rococo-dev --steps=50 --repeat=20 --pallet=runtime_parachains::paras --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./runtime/rococo/src/weights/runtime_parachains_paras.rs --header=./file_header.txt

* Replace max_block with Weight::MAX

Co-authored-by: Parity Bot <admin@parity.io>
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>
16 jobs for master in 12 minutes (queued for 13 minutes and 33 seconds)