Update golangci-lint to version 1.31.0

[kolaente]

This PR updates golangci-lint to the latest version 1.31.0.

The upgrade introduced a new check for which I've fixed or disabled most cases.

[zeripath]

FYI ReplaceAll is golang version >1.12 - which is why it wasn't previously used.

[codecov-io]

Codecov Report

Merging #13102 into master will increase coverage by 0.09%.
The diff coverage is 48.78%.

@@            Coverage Diff             @@
##           master   #13102      +/-   ##
==========================================
+ Coverage   42.41%   42.51%   +0.09%     
==========================================
  Files         673      673              
  Lines       74114    74113       -1     
==========================================
+ Hits        31436    31509      +73     
+ Misses      37581    37487      -94     
- Partials     5097     5117      +20     

Impacted Files	Coverage Δ
models/migrations/migrations.go	2.46% <0.00%> (ø)
modules/repository/check.go	0.00% <0.00%> (ø)
modules/structs/hook.go	6.89% <0.00%> (ø)
modules/task/migrate.go	26.22% <0.00%> (+0.42%)	⬆️
modules/util/sanitize.go	37.50% <0.00%> (ø)
routers/install.go	0.00% <0.00%> (ø)
routers/repo/http.go	43.11% <0.00%> (ø)
routers/repo/view.go	38.11% <0.00%> (ø)
routers/utils/utils.go	72.00% <0.00%> (ø)
modules/webhook/slack.go	30.00% <50.00%> (ø)
... and 24 more

---

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[6543]

🚀

[kolaente]

FYI ReplaceAll is golang version >1.12 - which is why it wasn't previously used.

Ah makes sense, thanks for noting.