ci: add fuzz jobs

[Fraccaman]

Describe your changes

depends-on: #3445

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

[mergify]

Merge Protections

Your pull request matches the following merge protections and will not be merged until they are valid.

⛓️ Depends-On Requirements

Requirement based on the presence of Depends-On in the body of the pull request

• depends-on=anoma/namada#3445 [⛓️ fuzz test txs #3445]

[codecov]

Codecov Report

Attention: Patch coverage is 23.14815% with 166 lines in your changes missing coverage. Please review.

Project coverage is 61.09%. Comparing base (80268fa) to head (c8cc6e3).
Report is 114 commits behind head on main.

Files	Patch %	Lines
crates/tx/src/types.rs	10.34%	52 Missing ⚠️
crates/core/src/key/secp256k1.rs	31.91%	32 Missing ⚠️
crates/core/src/key/ed25519.rs	36.36%	21 Missing ⚠️
crates/tx/src/data/pos.rs	0.00%	8 Missing ⚠️
crates/governance/src/storage/proposal.rs	0.00%	7 Missing ⚠️
crates/core/src/address.rs	0.00%	4 Missing ⚠️
crates/core/src/eth_bridge_pool.rs	0.00%	4 Missing ⚠️
crates/core/src/token.rs	0.00%	4 Missing ⚠️
crates/core/src/masp.rs	0.00%	3 Missing ⚠️
crates/trans_token/src/storage.rs	50.00%	3 Missing ⚠️
... and 19 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3662      +/-   ##
==========================================
- Coverage   61.18%   61.09%   -0.10%     
==========================================
  Files         312      312              
  Lines      101384   101560     +176     
==========================================
+ Hits        62033    62048      +15     
- Misses      39351    39512     +161     

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