ci: use LFS since XRootD is no longer supported (#435) #1765

Job	Run time
download_test_data (physics)	1m 42s
build_timeline	2m 25s
download_test_data (detectors)	14s
run_histogram (detectors)	3m 1s
test_swifjob (physics)	2m 21s
test_swifjob (detectors)	1m 53s
run_histogram (physics)	2m 56s
run_analysis (detectors)	5m 48s
run_analysis (physics)	1m 52s
	22m 12s

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