Mesh 2063 disable investor uniqueness migration

[Neopallium]

changelog

data migration

• Migrate Investor Uniqueness assets to non-investor Uniqueness assets.
• Remove all Asset.ClassicTickers.

[codecov[bot]]

Codecov Report

Merging #1492 (070d512) into testnet (f1f1bc4) will increase coverage by 0.05%. The diff coverage is 97.91%.

@@             Coverage Diff             @@
##           testnet    #1492      +/-   ##
===========================================
+ Coverage    53.86%   53.91%   +0.05%     
===========================================
  Files          146      146              
  Lines        31870    31916      +46     
===========================================
+ Hits         17166    17207      +41     
- Misses       14704    14709       +5     

Impacted Files	Coverage Δ
pallets/runtime/develop/src/runtime.rs	3.65% <ø> (ø)
pallets/asset/src/lib.rs	87.85% <97.91%> (+0.22%)	:arrow_up:

... and 3 files with indirect coverage changes