Use staticcheck instead of golint

[jsoriano]

Golint is discontinued, migrate to staticcheck. (see golang/go#44354 (comment)).

[elasticmachine]

💚 Build Succeeded

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• Start Time: 2021-09-03T11:58:16.752+0000

• Duration: 25 min 3 sec

• Commit: 41973fb

Test stats 🧪

Test	Results
Failed	0
Passed	422
Skipped	5
Total	427

Trends 🧪

[mdelapenya]

As a follow-up improvement, have you thought about integrating pre-commit? https://pre-commit.com/hooks.html It does support staticcheck

[jsoriano]

/test

[jsoriano]

Failing test is failing in other branches too.

[jsoriano]

Failing test is failing in other branches too.

PR open to skip the failing test #504

Issues detected by staticcheck addressed since this review.