Avoid redundant wrapper signatures

[grarco]

Describe your changes

Temporary, non-breaking workaround for #3883.

Adds an SDK function to remove the duplicated wrapper signatures that might come from build_batch. Updates batch_opt_reveal_pk_and_submit to call such function.

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 75.72816% with 25 lines in your changes missing coverage. Please review.

Project coverage is 73.25%. Comparing base (45e7e90) to head (b0df0e7).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/sdk/src/lib.rs	42.30%	15 Missing ⚠️
crates/sdk/src/signing.rs	87.01%	10 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3896   +/-   ##
=======================================
  Coverage   73.24%   73.25%           
=======================================
  Files         341      341           
  Lines      105240   105328   +88     
=======================================
+ Hits        77085    77156   +71     
- Misses      28155    28172   +17     

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[grarco]

@tzemanovic seems like we have a failure in the speculos test, could be because of the extra function called now for the signature but I'm not sure

[tzemanovic]

@tzemanovic seems like we have a failure in the speculos test, could be because of the extra function called now for the signature but I'm not sure

Yeah, it is that, but it's kinda odd - the first tx with bond has to be signed twice, but all the other txs (redeleg, unbonding and withdrawing) in that test have not changed.

Edit: the first tx is signed twice because of batched reveal tx, right? In the Ledger wallet it looks like it's just signing the same bond twice, maybe we can print something the client to make this clear (we have a similar UX issue in #3797).

[grarco]

@tzemanovic I'm closing this as in hindsight I believe it's better to pursue a cleaner solution such as #3883 (even if SDK breaking) rather than this non-breaking workaround