[sBTC DR] Remove tree depth from burn and mint

[friedger]

Summary of Changes

The parameter tree-depth is always the length of the proof minus 1 when calling was-tx-mined. This PR removes this parameter and uses the proof length instead.

This fixes #239.

Testing

Risks

This changes the public API of the contract and requires to update all clients, including the web bridge.

How were these changes tested?

Running ./scripts/tests.sh and cargo test

What future testing should occur?

Integration testing as in #215 and web integration testing.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

Merging #240 (def13f4) into main (3ec2c8a) will decrease coverage by 0.38%.
The diff coverage is 85.03%.

@@            Coverage Diff             @@
##             main     #240      +/-   ##
==========================================
- Coverage   38.76%   38.39%   -0.38%     
==========================================
  Files          45       45              
  Lines        5167     5134      -33     
  Branches       47       47              
==========================================
- Hits         2003     1971      -32     
+ Misses       3163     3162       -1     
  Partials        1        1              

Flag	Coverage Δ
unittests	76.61% <85.03%> (-2.28%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
romeo/asset-contract/contracts/asset.clar	100.00% <100.00%> (ø)
...asset-contract/contracts/clarity-bitcoin-mini.clar	90.32% <100.00%> (-0.31%)	⬇️
romeo/asset-contract/tests/asset_test.clar	74.07% <100.00%> (ø)
romeo/src/proof_data.rs	98.63% <ø> (-0.08%)	⬇️
romeo/src/system.rs	0.00% <ø> (ø)
...ontract/contracts/clarity-bitcoin-mini-deploy.clar	0.00% <0.00%> (ø)
...sset-contract/tests/clarity-bitcoin-mini_test.clar	89.58% <89.47%> (-4.33%)	⬇️

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[radicleart]

Looks good.

[AshtonStephens]

LGTM.