Add confidential transfer constants

[dssei]

Describe your changes and provide context

Add confidential transfer constants

Testing performed to validate your change

• imported into CT module in a separate branch in e.g. https://github.com/sei-protocol/sei-chain/blob/feature/ct_types/aclmapping/confidentialtransfers/mappings.go#L51

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.87%. Comparing base (a4eb451) to head (b432ac7).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #552      +/-   ##
==========================================
- Coverage   54.87%   54.87%   -0.01%     
==========================================
  Files         631      631              
  Lines       54937    54937              
==========================================
- Hits        30148    30145       -3     
- Misses      22633    22635       +2     
- Partials     2156     2157       +1     

see 1 file with indirect coverage changes