Upgrade Go to 1.25.5 and Atlas to v0.38.1 (#2599) #314

Job	Run time
test / Test (cli)	1m 59s
test / Test (controlplane)	6m 50s
test / Test (artifact-cas)	41s
test / Test (main-module)	3m 51s
init_attestation	11s
Release CLI and control-plane/artifact-cas container images	14m 31s
Finish Attestation	15s
modify_release_notes	12s
	28m 30s

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