bpf: Define EGRESS_MAP in dummy node_config.h
bpf: Define EGRESS_MAP in dummy node_config.h

Values in node_config.h are used while compile-testing and during
verifier tests (verifier-test.sh and K8sVerifier). Because EGRESS_MAP is
currently undefined in that file, the EGRESS_MAP is literally created in
the bpffs instead of test_cilium_xxx. This commit fixes it.

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

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