CLEANUP/MINOR: ci: remove deprecated gitlab token usage #488

Job	Run time
HAProxy check commit message	0s
generate-models	55s
generate-specification	40s
go mod tidy	5s
golangci-lint	40s
lint-spec	8s
Build	12s
Tests	20s
e2e on HAProxy (2.1)	47s
e2e on HAProxy (2.2)	46s
e2e on HAProxy (2.3)	52s
e2e on HAProxy (2.4)	47s
e2e on HAProxy (2.5)	45s
e2e on HAProxy (2.6)	45s
e2e on HAProxy (2.7)	47s
e2e on HAProxy (2.8)	44s
	9m 13s

Provide feedback