Update go.mod's gazelle to 0.21.1

[rifelpet]

I had updated the gazelle version in WORKSPACE earlier but it turns out it is defined twice, and the hack/update-bazel.sh script uses the go module copy, so this updates the go.mod instance to match the WORKSPACE instance.

03e620b#diff-09498dbadf45966909850dc8a47ebb13L16-L23

[k8s-ci-robot]

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[k8s-ci-robot]

@rifelpet: The following tests failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
pull-kops-verify-bazel	4332cb8	link	/test pull-kops-verify-bazel
pull-kops-bazel-test	4332cb8	link	/test pull-kops-bazel-test
pull-kops-e2e-kubernetes-aws	4332cb8	link	/test pull-kops-e2e-kubernetes-aws
pull-kops-verify-gomod	4332cb8	link	/test pull-kops-verify-gomod
pull-kops-bazel-build	4332cb8	link	/test pull-kops-bazel-build

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[k8s-ci-robot]

@rifelpet: PR needs rebase.

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[rifelpet]

@hakman determined this depends on rules_go 0.23 which will require larger work around arch-specific builds, so we may defer until k/k upgrades to rules_go to update this as well.
/close

[k8s-ci-robot]

@rifelpet: Closed this PR.

In response to this:

@hakman determined this depends on rules_go 0.23 which will require larger work around arch-specific builds, so we may defer until k/k upgrades to rules_go to update this as well.
/close

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