[backport] fix: EOTS signing for multiple finality providers (#199) #446

Job	Run time
lint_test / build	36s
lint_test / check-mock-gen	0s
docker_pipeline / prepare-metadata	1s
lint_test / gosec	2m 38s
lint_test / integration-tests	7m 38s
lint_test / lint	51s
lint_test / unit-tests	1m 51s
docker_pipeline / docker_build (linux/amd64, ubuntu-24.04)	3m 26s
docker_pipeline / docker_build (linux/arm64, ubuntu-24.04-arm64)	3m 17s
docker_pipeline / merge_dockerhub	0s
docker_pipeline / merge_ecr	0s
	20m 18s

Provide feedback