chore: remove deprecated io/ioutil methods

[notJoon]

Description

Replace depreacated io/ioutil to os methods

[codecov]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (338be19) 47.87% compared to head (33daa49) 55.78%.
Report is 26 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1277      +/-   ##
==========================================
+ Coverage   47.87%   55.78%   +7.90%     
==========================================
  Files         372      421      +49     
  Lines       62990    66124    +3134     
==========================================
+ Hits        30158    36885    +6727     
+ Misses      30371    26360    -4011     
- Partials     2461     2879     +418     

Files	Coverage Δ
gnovm/pkg/gnolang/nodes.go	52.94% <100.00%> (+17.64%)	⬆️
tm2/pkg/bft/config/toml.go	77.19% <100.00%> (ø)
tm2/pkg/bft/rpc/lib/server/handlers.go	50.09% <100.00%> (ø)
tm2/pkg/db/fsdb.go	66.47% <100.00%> (ø)
gnovm/pkg/gnolang/precompile.go	63.90% <0.00%> (+40.97%)	⬆️
gnovm/pkg/gnomod/gnomod.go	69.65% <50.00%> (ø)
tm2/pkg/amino/genproto/genproto.go	26.03% <0.00%> (+0.15%)	⬆️
gnovm/tests/imports.go	77.27% <0.00%> (-0.49%)	⬇️
tm2/pkg/bft/rpc/lib/client/http_client.go	14.23% <0.00%> (ø)

... and 121 files with indirect coverage changes

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[thehowl]

looks good 👍

there's more ioutil calls throughout the codebase. I think we should also remove the io/ioutil in Gno's stdlibs.

do you want to tackle this here or in a separate PR?

thanks!

[notJoon]

do you want to tackle this here or in a separate PR?

Thanks! I think it would be better to tackle them in here.

[thehowl]

good job on the PR!

I saw that you removed basically all calls to ioutil like I suggested. I suggest you continue on this, and remove ioutil also from gno files (they all just use ioutil.ReadAll) and from gnovm/tests/imports.go.

thanks!

[notJoon]

@thehowl Thanks for your suggest! I think now I'm done with the ioutil stuff now. I skipped the documents because it appears to be updated in #1311.

However, I'm still getting tests failing on the action, but when I run it locally, it works fine. I'm not sure what to do about that.

[thehowl]

this looks good, I asked for another review just to be sure but we should be good to go.