Don't build namadar

[brentstone]

Describe your changes

Just don't build it anymore, can easily incorporate back into namada_apps if we decide to use it in the future.

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.43%. Comparing base (c7f6a80) to head (fe0feae).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3752      +/-   ##
==========================================
+ Coverage   72.42%   72.43%   +0.01%     
==========================================
  Files         335      335              
  Lines      104005   104005              
==========================================
+ Hits        75322    75334      +12     
+ Misses      28683    28671      -12     

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