People chain integration tests (#6377)

# Description

Made as a follow-up of
polkadot-fellows/runtimes#499

## Integration

N/A

## Review Notes

N/A

---------

Co-authored-by: Dónal Murray <donal.murray@parity.io>

Author: rockbmb

Cargo.lock

@@ -21,6 +21,7 @@ sp-runtime = { workspace = true }
 # Polkadot
 polkadot-runtime-common = { workspace = true, default-features = true }
 westend-runtime-constants = { workspace = true, default-features = true }
+westend-runtime = { workspace = true }
 xcm = { workspace = true }
 xcm-executor = { workspace = true }