Bump up golangci-lint and fix lint errors

[hackerwins]

What this PR does / why we need it:

Bump up golangci-lint and fix lint errors

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Additional documentation:

Checklist:

• Added relevant tests or not required
• Didn't break anything

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (main@f922afc). Click here to learn what that means.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #660   +/-   ##
=======================================
  Coverage        ?   48.93%           
=======================================
  Files           ?       69           
  Lines           ?    10072           
  Branches        ?        0           
=======================================
  Hits            ?     4929           
  Misses          ?     4627           
  Partials        ?      516           

Files	Coverage Δ
pkg/document/crdt/text.go	61.90% <100.00%> (ø)
server/backend/database/mongo/client.go	39.58% <100.00%> (ø)
server/backend/sync/memory/coordinator.go	31.25% <ø> (ø)
server/backend/database/memory/database.go	48.09% <66.66%> (ø)
server/backend/sync/memory/locker.go	0.00% <0.00%> (ø)

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