Add runtime_metadata_match, creation_metadata_match

[marcocastignoli]

New columns in verified_contracts:

• runtime_metadata_match
• creation_metadata_match

Rules:

• If the contract has auxdata transformation, set metadata_match as false
• If the contract has no metadata hash, set metadata_match fields to false
• If the contract has the metadata hash and no auxdata transformation set metadata_match to true

[rimrakhimov]

Lgtm