.github: AWS-CNI end-to-end test
.github: AWS-CNI end-to-end test

This commit introduces a new GitHub workflow to test Cilium running in
chaining mode on top of AWS-CNI. We currently don't have any end-to-end
tests covering chaining mode, so this test is meant to prevent
regressions in that mode.

The test installs Cilium with Helm for now and until cilium-cli supports
chaining (it currently deletes the aws-node DaemonSet). The cilium-cli
is still used to run the connectivity checks.

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

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