Implement `Metadata` validation

[golddydev]

Story

While implementing UTxOW rules, Tx Metadata check is missing.

Description

Rules:

• MissingTxBodyMetadataHash Tx has Metadata but no hash
• MissingTxMetadata Tx has metadata hash, but no Metadata
• ConflictingMetadataHash Metadata hash mismatch with its content
• InvalidMetadata

Acceptance Criteria

• Add functions to check Metadata rules
• Add test cases with mock transaction
• Integrate to omnibus process