CI: Use generated filename for Cilium preflight check
CI: Use generated filename for Cilium preflight check

Previously, the deployment was using the wrong filename, causing it to
fail with 'error: the path "cilium-preflight.yaml" does not exist'.

Fixes: 8242367d ("CI: Use unique helm template outputs in tests")

Signed-off-by: Sebastian Wicki <db043b2055cb3a47b2eb0b5aebf4e114a8c24a5a@isovalent.com>

tgraf/cilium,tgraf/cilium,cilium/cilium,tgraf/cilium,tklauser/cilium,cilium-team/cilium,tgraf/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,tklauser/cilium,michi-covalent/cilium,cilium/cilium,tklauser/cilium,tklauser/cilium,michi-covalent/cilium,cilium-team/cilium,cilium/cilium,cilium/cilium,tklauser/cilium,michi-covalent/cilium,tgraf/cilium,tgraf/cilium