docs: fix broken external links

[PerceiveWorld]

Summary

• Fix the broken Grafana dashboards script links in English and Chinese monitoring docs by using the current release-2.0 branch URL.
• Move the deprecated TiDB Binlog overview links to the docs archive for both English and Chinese docs.

Fixes #3132.

Checks

• git diff --check
• curl -L -s -o /dev/null -w "%{http_code}" https://raw.githubusercontent.com/pingcap/tidb-operator/refs/heads/release-2.0/hack/get-grafana-dashboards.sh -> 200
• curl -L -s -o /dev/null -w "%{http_code}" https://docs-archive.pingcap.com/tidb/v8.3/tidb-binlog-overview/ -> 200
• curl -L -s -o /dev/null -w "%{http_code}" https://docs-archive.pingcap.com/zh/tidb/v8.3/tidb-binlog-overview/ -> 200

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