refactor(extractors): decouple extractors from common crate

[shiyasmohd]

Remove dependency on common crate from all extractors (evm-rpc, firehose, solana)
by moving shared types and utilities to datasets-raw.

Changes:

• Move EVM table schemas (blocks.rs, logs.rs) from common to datasets-raw
• Move arrow_helpers.rs with array builders to datasets-raw
• Move provider.rs from common to evm-rpc extractor
• Add primitive types (BoxError, Bytes32, EvmAddress, etc.) to datasets-raw
• Update all extractor imports to use datasets-raw instead of common
• Remove common dependency from evm-rpc, firehose, and solana Cargo.toml

[LNSD]

The resulting dependency graph (common crate's dependencies):

[LNSD]

The goal of this refactoring is to break the dependency on common, and the outcome should also add value in terms of organization.

Please check my comments. And check whether there are any other similar pieces of code that need to be moved into the "chain-specific" raw datasets modules.

As a rule of thumb:

• Specific to one extractor: keep it in the extractor crate.
• Common to different extractors (same chain technlogy, e.g., evm): Move it to raw_datasets::evm::*.
• Common to all extractors: raw_datasets::<specific-module>::* (e.g., arrow helpers in raw_datasets::arrow::*).
• Common to all datasets: datasets_common crate.

[LNSD]

This is looking much better 😁

I have detected some minor issues. Can you check my comments?

[LNSD]

LGTM ✅