fix(api-gateway): Support proxy when fetching jwk for token validation #20116

Job	Run time
latest-tag-sha	24s
build	9m 55s
Build & Test :dev for Debian without pushing	21m 53s
build-cubestore	4m 15s
lint	5m 11s
unit (20.x, 3.11, false)	17m 8s
unit (20.x, 3.11, true)	17m 29s
unit (22.x, 3.11, false)	16m 39s
unit (22.x, 3.11, true)	17m 24s
integration-cubestore (20.x)	11m 28s
integration-smoke (20.x, 3.11)	21m 42s
docker-image-latest-set-tag	4s
integration (20.x, clickhouse)	10m 16s
integration (20.x, druid)	10m 12s
integration (20.x, elasticsearch)	9m 53s
integration (20.x, mssql)	10m 20s
integration (20.x, mysql)	11m 12s
integration (20.x, postgres)	10m 16s
integration (20.x, prestodb)	10m 3s
integration (20.x, mysql-aurora-serverless)	9m 46s
integration (20.x, crate)	9m 35s
integration (20.x, mongobi)	9m 36s
integration (20.x, firebolt)	9m 29s
integration (20.x, dremio)	11m 4s
integration (20.x, vertica)	10m 9s
	4h 35m 23s

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