test/Runtime: Skip pre/post-checks during build
test/Runtime: Skip pre/post-checks during build

When building images for the K8s CI jobs, we don't run the pre and
post checks. We do however for the Runtime CI job. That is unnecessary
because we already have other CI checks for this (Smoke tests and Travis
CI). This commit changes the Runtime job to be consistent with the K8s
jobs.

Signed-off-by: Paul Chaignon <a027184a55211cd23e3f3094f1fdc728df5e0500@cilium.io>

cilium/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium