Automatic snapshot pre-release monthly-2022-04

Changes since last snapshot (monthly-2022-03)

Substrate changes

Runtime

• contracts: add seal_code_hash and seal_own_code_hash to API (#10933)
• Add a bounded fallback on failed elections (#10988)
• Improve Bounties and Child Bounties Deposit Logic (#11014)
• Allow pallet error enum variants to contain fields (#10242)
• Stabilize seal_delegate_call (#11037)
• Minor Uniques pallet improvements and XCM v3 preparations (#10896)

Client

• Add benchmark-block command (#11091)
• Add dev_getBlockStats RPC (#10939)
• Add execution overhead benchmarking (#10977)
• Additional benchmark-storage flags (#11004)
• Deprecate "paritydb-experimental" CLI in favour or "paritydb" (#10975)
• Refactored block body database scheme (#10779)

API

• Allow pallet error enum variants to contain fields (#10242)
• Make bags-list generic over node value and instantiable (#10997)
• [contracts] Stabilize "seal0" is_contract and caller_is_origin (#10971)