fix(prow): normalize goproxy for prow-jobs/pingcap/tidb-binlog

[Copilot]

All four GO_PROXY entries in prow-jobs/pingcap/tidb-binlog/latest-presubmits.yaml pointed to http://goproxy.apps.svc — an internal Kubernetes cluster-DNS endpoint inaccessible outside the cluster.

Changes

• prow-jobs/pingcap/tidb-binlog/latest-presubmits.yaml: Replace all occurrences of the internal proxy with the official Go module proxy:

- value: http://goproxy.apps.svc,direct
+ value: https://proxy.golang.org,direct

Affects all four jobs: pull-build, pull-check, pull-unit-test, wip-pull-integration-test.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>goproxy: normalize proxies for prow-jobs/pingcap/tidb-binlog</issue_title>
<issue_description>Replace internal goproxy endpoints for prow-jobs/pingcap/tidb-binlog with official/public proxies.

Acceptance criteria:

• No internal goproxy endpoints in prow-jobs/pingcap/tidb-binlog
• GOPROXY values set to default or official proxies
  </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes goproxy: normalize proxies for prow-jobs/pingcap/tidb-binlog #4238

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[ti-chi-bot]

Hi @Copilot. Thanks for your PR.

I'm waiting for a PingCAP-QE 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.

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[ti-chi-bot]

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