feat: extract_contract_call_data function pub modifier

[zees-dev]

Summary

Made the extract_contract_call_data function public in the ReceiptParser struct to allow external access to the function.
This is required to construct low-level calls if you dont want to use CallHandler and instead want to manually deal with the low-level bytes (Vec<u8>) data.

Checklist

• All changes are covered by tests (or not applicable)
• All changes are documented (or not applicable)
• I reviewed the entire PR myself (preferably, on GH UI)
• I described all Breaking Changes (or there's none)