Bump golangci-lint to v1.48.0

[saschagrunert]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

This incorporates new linters as well as the configuration update. New lint reports have been fixed as well.

Which issue(s) this PR fixes:

None

Does this PR have test?

None

Special notes for your reviewer:

None

Does this PR introduce a user-facing change?

None

[codecov-commenter]

Codecov Report

Merging #1072 (761bbe7) into main (b33aada) will increase coverage by 0.03%. The diff coverage is 66.66%.

@@            Coverage Diff             @@
##             main    #1072      +/-   ##
==========================================
+ Coverage   50.43%   50.46%   +0.03%     
==========================================
  Files          42       42              
  Lines        4761     4756       -5     
==========================================
- Hits         2401     2400       -1     
+ Misses       2281     2278       -3     
+ Partials       79       78       -1     

[pjbgf]

/retest

[saschagrunert]

Rebased and fixed a bunch of other lint reports.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JAORMX, jhrozek, pjbgf, saschagrunert

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• ~~OWNERS~~ [JAORMX,jhrozek,pjbgf,saschagrunert]

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