organize tests

[NoahSaso]

this organizes tests a bit more and prepares a suite to help create DAOs. it could be improved, but it is good enough for now to use for #888, and it will be improved further as it is used in creating a new set of tests.

• moved all contract wrappers to dao-testing
• created a dao-testing suite that helps quickly create DAOs with any of the various voting modules
• rewrote dao-rewards-distributor tests to use dao-testing suite as a proof of concept

[codecov]

Codecov Report

Attention: Patch coverage is 99.67015% with 6 lines in your changes missing coverage. Please review.

Project coverage is 96.64%. Comparing base (b0c7ef1) to head (9112c09).

Files with missing lines	Patch %	Lines
...l/dao-proposal-multiple/src/testing/instantiate.rs	76.19%	5 Missing ⚠️
contracts/external/cw-token-swap/src/error.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           development     #890      +/-   ##
===============================================
- Coverage        96.67%   96.64%   -0.04%     
===============================================
  Files              241      241              
  Lines            65989    65122     -867     
===============================================
- Hits             63798    62938     -860     
+ Misses            2191     2184       -7     

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[JakeHartnell]

❤️