proxyd/fix: rewrite should support BlockNumberOrHash

[felipe-op]

Description

Block numbers are sometimes hashes, and the marshalling decides based on the contents. We need to support accepting BlockNumberOrHash in tag rewrites.

Example request:

{"auth":"none","body":"{\"jsonrpc\":\"2.0\",\"id\":12,\"method\":\"eth_getStorageAt\",\"params\":[\"0xae851f927ee40de99aabb7461c00f9622ab91d60\",\"0x65a7ed542fb37fe237fdfbdd70b31598523fe5b32879e307bae27a0bd9581c08\",\"0x1c4840bcb3de3ac403c0075b46c2c47d4396c5b624b6e1b2874ec04e8879b483\"]}","lvl":"info","msg":"Raw RPC request","req_id":"06d2e2e291ce6528958c","t":"2023-05-04T21:45:24.548498655Z"}

Tests

Add new test to cover this code path

Invariants

n/a

Additional context

This is part of the project Consensus Aware RPC Proxy: https://www.notion.so/oplabs/Consensus-Aware-RPC-Proxy-0138e029af814e4cbca2740c7888e02d

Tag rewrite PR: #5586

Fixes

• INF-196

TODOs

• Author or reviewer has added an entry to the current release notes draft, if appropriate -- not applicable

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