ci: use LFS since XRootD is no longer supported #1764

Job	Run time
build_timeline	2m 35s
download_test_data (detectors)	8s
download_test_data (physics)	40s
run_histogram (detectors)	3m 6s
run_histogram (physics)	3m 1s
test_swifjob (detectors)	1m 55s
test_swifjob (physics)	2m 56s
run_analysis (physics)	2m 15s
run_analysis (detectors)	6m 22s
	22m 58s

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