add e2e test with encrypted keyring (#45) #44

Job	Run time
go_sec_covenant_signer	1m 12s
lint_test / build	47s
lint_test / lint	31s
lint_test / check-mock-gen	0s
lint_test / gosec	2m 29s
lint_test / integration-tests	7m 17s
lint_test / unit-tests	1m 29s
docker_pipeline / dockerfile_lint	19s
docker_pipeline / prepare-metadata	1s
docker_pipeline / docker_build (linux/amd64, ubuntu-24.04)	3m 15s
docker_pipeline / docker_build (linux/arm64, ubuntu-24.04-arm64)	3m 20s
docker_pipeline / merge_dockerhub	13s
docker_pipeline / merge_ecr	14s
docker_pipeline / vulnerability_scan	34s
	21m 41s

Provide feedback