Test malleability attacks

[grarco]

Describe your changes

• Adds property tests for malleability attacks on transactions
• Improves test_wrapper_unknown_address
• Removes old references to encrypted/decrypted txs

Checklist before merging

• If this PR has some consensus breaking changes, I added the corresponding breaking:: labels
  • This will require 2 reviewers to approve the changes
• If this PR requires changes to the docs or specs, a corresponding PR is opened in the namada-docs repo
  • Relevant PR if applies:
• If this PR affects services such as namada-indexer or namada-masp-indexer, a corresponding PR is opened in that repo
  • Relevant PR if applies:

[codecov]

Codecov Report

Attention: Patch coverage is 95.55556% with 6 lines in your changes missing coverage. Please review.

Project coverage is 74.25%. Comparing base (3a68288) to head (2a98138).
Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/node/src/shell/process_proposal.rs	88.23%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3925      +/-   ##
==========================================
+ Coverage   74.09%   74.25%   +0.15%     
==========================================
  Files         341      341              
  Lines      107204   107271      +67     
==========================================
+ Hits        79431    79650     +219     
+ Misses      27773    27621     -152     

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[brentstone]

What is the status of this?

[grarco]

What is the status of this?

I believe it's ready for merge