Override compute_wtxid() and compute_txid() functions with patched sha256 impl

[kpp]

Description

Use our calculate_double_sha256() to compute txid/wtxid in zk context.

Linked Issues

• Fixes Override compute_wtxid() and compute_txid() functions with patched sha256 impl. #1710

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.2%. Comparing base (1265a26) to head (537e153).

Additional details and impacted files

Files with missing lines	Coverage Δ
crates/bitcoin-da/src/helpers/merkle_tree.rs	95.3% <100.0%> (ø)
crates/bitcoin-da/src/helpers/mod.rs	88.8% <100.0%> (+8.1%)	⬆️
crates/bitcoin-da/src/verifier.rs	76.8% <100.0%> (-0.2%)	⬇️

... and 2 files with indirect coverage changes

[eyusufatik]

hold-merge label for two reasons:

• @kpp wants to write unit tests for the new functions.
• if we merge this now, the batch proof elfs on testnet and devnet will defer in behaviour -- which might be ok, need to think about it.

[eyusufatik]

aproving but don't merge