Core: REST HttpClient connections config #9195
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amogh-jahagirdar
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The default config for http connections is only 25 connections and 5 per host. Since the REST client is typically talking to a single host, the number of connections allowed is relatively small and can cause contention where the client is shared across multiple running jobs (Spark/Trino/Kafka Connect, etc.).
This PR increases the defaults and allows for configuring the values. The pool grows dynamically as connections are needed and reused if available, so higher defaults should not impact typical usage, but allows for growth if there is contention.