fix: Update name and symbol to be optional in a fungible asset type

[GuillaumeRx]

This makes the name and symbol of an asset optional per the SIP-29 update.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.73%. Comparing base (9a467b6) to head (b0c6bb1).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3300   +/-   ##
=======================================
  Coverage   94.73%   94.73%           
=======================================
  Files         518      518           
  Lines       11945    11947    +2     
  Branches     1834     1836    +2     
=======================================
+ Hits        11316    11318    +2     
  Misses        629      629           

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