fix(rate-limiting): fix duplicate kong rate limit headers #14357
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When a service's upstream is another service with rate-limiting enabled, enabling a rate-limiting plugin on the service results in duplicate headers. This PR fixes the issue by removing Kong's rate-limiting headers from the upstream response and applying only the headers from the plugin. Kong#14353
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Summary
When a service's upstream is another service with rate-limiting enabled, enabling a rate-limiting plugin on the service results in duplicate headers. This PR fixes the issue by removing Kong's rate-limiting headers from the upstream response and applying only the headers from the plugin.
Checklist
changelog/unreleased/kongorskip-changeloglabel added on PR if changelog is unnecessary. README.mdIssue reference
Fix #14353