feat(shs-5693): attached files in heros and spotlights #1102

Job	Run time
set_sites	43s
test_phpunit	1m 29s
lint_theme	36s
test_new_site	8m 7s
test_existing_site (artexhibitions)	5m 59s
test_existing_site (biology)	11m 20s
test_existing_site (ceas)	8m 16s
test_existing_site (creees)	7m 25s
test_existing_site (default)	5m 12s
test_existing_site (dlcl)	10m 29s
test_existing_site (iriss)	7m 52s
test_existing_site (mtl)	8m 33s
test_existing_site (sgs)	9m 15s
test_existing_site (tessier_lavigne_lab)	5m 26s
deploy_branch	0s
	1h 30m 42s

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