fix(prover): Create reqwest client only once #22080

Job	Run time
Get changed files	24s
CI for Core lint Components	0s
CI for Core Components	0s
CI for Docs	0s
Build contract verifier	0s
Build core images	0s
Build TEE Prover images	0s
E2E Test for Prover Components / e2e-test	37m 0s
CI for Common Components (prover or core) / build	10m 13s
CI for Prover Components / lint	5m 58s
CI for Prover Components / unit-tests	8m 19s
Build prover images / Get protocol version	1m 43s
Build prover images with avx512 instructions / Get protocol version	1m 8s
Build prover images with avx512 instructions / Build and Push Docker Images (witness-generator)	2m 29s
Build prover images / Build and Push Docker Images (witness-generator)	2m 30s
Build prover images / Build and Push Docker Images (prover-gpu-fri)	6m 19s
Build prover images / Build and Push Docker Images (witness-vector-generator)	3m 1s
Build prover images / Build and Push Docker Images (prover-fri-gateway)	2m 12s
Build prover images / Build and Push Docker Images (prover-job-monitor)	2m 16s
Build prover images / Build and Push Docker Images (proof-fri-gpu-compressor)	7m 40s
Build prover images / Build and Push Docker Images (prover-autoscaler)	2m 30s
Build prover images / Build and Push Docker Images (circuit-prover-gpu)	5m 14s
Build prover images / Copy images between docker registries	0s
Github Status Check	1s
	1h 38m 57s

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