feat: enable multiple pausers and unpausers

[Zygimantass]

Description

This PR enables the ICS20Transfer contracts to initialize with multiple pausers and unpausers.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.86%. Comparing base (cf3b2d8) to head (e376bcc).
Report is 18 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #388   +/-   ##
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  Coverage   99.86%   99.86%           
=======================================
  Files          14       14           
  Lines         731      740    +9     
=======================================
+ Hits          730      739    +9     
  Misses          1        1           

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[gjermundgaraba]

Actually, we don't want to have all this complex initialization stuff. Rather the deployment procedure should be that we set it up with a simple wallet and then give all the permissions as separate actions (including the deployer to set set the correct admin). This can all still be done in a script though.

In fact, if anything we would probably want to remove more from the initializer function to make it simpler.