chore: use cosmossdk.io/errors

[rootulp]

Closes #1446

Before: make lint showed warnings
After: make lint shows no more warnings

$ make lint
--> Running golangci-lint
--> Running markdownlint

[codecov-commenter]

Codecov Report

Merging #1448 (cf60b1a) into main (4ee939b) will decrease coverage by 0.03%.
The diff coverage is 14.81%.

@@            Coverage Diff             @@
##             main    #1448      +/-   ##
==========================================
- Coverage   49.21%   49.19%   -0.03%     
==========================================
  Files          79       79              
  Lines        4480     4478       -2     
==========================================
- Hits         2205     2203       -2     
  Misses       2091     2091              
  Partials      184      184              

Impacted Files	Coverage Δ
app/verify_txs.go	0.00% <0.00%> (ø)
x/blob/handler.go	0.00% <0.00%> (ø)
x/qgb/abci.go	51.02% <ø> (ø)
x/qgb/handler.go	0.00% <0.00%> (ø)
x/qgb/keeper/keeper_valset.go	27.11% <0.00%> (ø)
x/qgb/types/validator.go	39.79% <0.00%> (ø)
x/qgb/types/valset.go	0.00% <0.00%> (ø)
x/qgb/keeper/keeper_data_commitment.go	52.45% <25.00%> (ø)
x/qgb/types/genesis.go	70.96% <100.00%> (ø)
x/tokenfilter/ibc_middleware.go	100.00% <100.00%> (ø)
... and 1 more

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[rach-id]

LGTM

[evan-forbes]

thanks for switching!