Adding nix configurations and setup #39943

Job	Run time
Check Paths That Require Tests To Run	12s
Enforce CTF Version	7s
Build and Lint integration-tests	2m 53s
Get Solana Sha From Go Mod	33s
Compare/Build Automation Test List	5s
Build Chainlink Image	6s
Build Chainlink Image (plugins)	6s
Build Test Image	0s
Get ProjectSerum Version	3s
Check If Solana Test Image Exists	9s
Solana Build Artifacts	54s
Version Migration Tests	0s
Solana Build Test Image	2s
ETH Smoke Tests cron	1m 4s
ETH Smoke Tests flux	1m 2s
ETH Smoke Tests automation-01	16s
ETH Smoke Tests automation-02	14s
ETH Smoke Tests ocr	58s
ETH Smoke Tests automation-03	11s
ETH Smoke Tests automation-04	16s
ETH Smoke Tests automation-05	11s
ETH Smoke Tests ocr2	1m 13s
ETH Smoke Tests ocr2-plugins	1m 2s
ETH Smoke Tests automation-06	11s
ETH Smoke Tests runlog	59s
ETH Smoke Tests automation-07	14s
ETH Smoke Tests vrf	1m 4s
ETH Smoke Tests automation-08	11s
ETH Smoke Tests vrfv2	1m 19s
ETH Smoke Tests automation-09	11s
ETH Smoke Tests vrfv2plus	1m 7s
ETH Smoke Tests automation-10	16s
ETH Smoke Tests forwarder_ocr	54s
ETH Smoke Tests forwarders_ocr2	1m 7s
Solana Smoke Tests	7s
ETH Smoke Tests	6s
Clean up integration environment deployments	1m 18s
ETH Smoke Tests Go Mod Cache	2m 20s
	23m 1s

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