Scaling improvements for Athena event consumption and s3sessions #42783
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This PR fixes a potential deadlock in the athenaevents consumer and improves the behavior of the HTTP clients used by athena (in the consumer, as the producer was already improved in the same way in #42275) and s3sessions, by allowing them to meaningfully reuse connections in situations of high concurrency.
changelog: improved the performance of the Athena audit log and S3 session storage backends