use framework.ExpectNoError() for e2e/network

[k-toyoda-pi]

What type of PR is this?
/kind cleanup

What this PR does / why we need it:
The e2e test framework has ExpectNoError() for readable test code.
This replaces gomega.Expect(err).NotTo(gomega.HaveOccurred()) with it for e2e/network.

• test/e2e/network/dns.go
• test/e2e/network/dns_common.go
• test/e2e/network/example_cluster_dns.go
• test/e2e/network/firewall.go
• test/e2e/network/network_policy.go
• test/e2e/network/network_tiers.go
• test/e2e/network/proxy.go

Which issue(s) this PR fixes:
Ref #77103

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

Hi @k-toyoda-pi. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[dcbw]

/ok-to-test

[k-toyoda-pi]

/test pull-kubernetes-e2e-gce-device-plugin-gpu

[draveness]

/retest

[draveness]

cc/ @oomichi

[oomichi]

/test pull-kubernetes-kubemark-e2e-gce-big

[oomichi]

/lgtm

[k-toyoda-pi]

/assign @thockin
for approval

[thockin]

Thanks!

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: k-toyoda-pi, thockin

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• test/e2e/network/OWNERS [thockin]

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[oomichi]

/test pull-kubernetes-kubemark-e2e-gce-big

[oomichi]

/test pull-kubernetes-kubemark-e2e-gce-big

[oomichi]

/test pull-kubernetes-kubemark-e2e-gce-big

[k-toyoda-pi]

/test pull-kubernetes-integration

[k-toyoda-pi]

/test pull-kubernetes-integration

[fejta-bot]

/retest
This bot automatically retries jobs that failed/flaked on approved PRs (send feedback to fejta).

Review the full test history for this PR.

Silence the bot with an /lgtm cancel or /hold comment for consistent failures.

[oomichi]

/test pull-kubernetes-integration

[oomichi]

/test pull-kubernetes-e2e-gce-100-performance

[oomichi]

/test pull-kubernetes-e2e-gce-100-performance

[oomichi]

/test pull-kubernetes-e2e-gce-100-performance

[k8s-ci-robot]

@k-toyoda-pi: The following test failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
pull-kubernetes-e2e-gce	ba4119a	link	/test pull-kubernetes-e2e-gce

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.