NO-JIRA: bump golangci-lint to v1.56.2

[flavianmissi]

also run gofumpt.

[openshift-ci-robot]

@flavianmissi: This pull request explicitly references no jira issue.

In response to this:

also run gofumpt.

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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[dmage]

/lgtm

[flavianmissi]

/retest

[flavianmissi]

this does not affect end-users
/label docs-approved
/label px-approved

[flavianmissi]

@wewang58 this does not affect the product in any way, it's just bumping a linter version. can you qe approve?
/assign @wewang58

[flavianmissi]

/test e2e-azure-operator

[wewang58]

/label qe-approved

[openshift-bot]

[ART PR BUILD NOTIFIER]

This PR has been included in build ose-cluster-image-registry-operator-container-v4.16.0-202403141746.p0.g749d902.assembly.stream.el9 for distgit ose-cluster-image-registry-operator.
All builds following this will include this PR.