ci(workflows): remove GitHub laebl and project workflows #317

Job	Run time
determine-target	1s
model-deploy / integration-test	20m 28s
backend (artifact-backend) / integration-test	7m 13s
backend (model-backend) / integration-test	7m 25s
backend (mgmt-backend) / integration-test	7m 59s
backend (pipeline-backend) / integration-test	7m 54s
	51m 0s

Provide feedback