fix: skip blacklisted tokens in QueryMaxBorrow and QueryMaxWithdraw

[toteki]

Description

closes: #XXXX

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Author Checklist

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[codecov-commenter]

Codecov Report

Merging #1710 (2225db5) into main (6edb0f1) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1710      +/-   ##
==========================================
+ Coverage   58.18%   58.19%   +0.01%     
==========================================
  Files          73       73              
  Lines        7911     7913       +2     
==========================================
+ Hits         4603     4605       +2     
  Misses       2953     2953              
  Partials      355      355              

Impacted Files	Coverage Δ
x/leverage/keeper/grpc_query.go	66.00% <100.00%> (+0.22%)	⬆️