Add cilium_egress_v4 to ignoredELFPrefixes
Add cilium_egress_v4 to ignoredELFPrefixes

cilium_egress_v4 map was not added in the list of symbols to skip in the
ELF, resulting in the following warning:

    level=warning msg="Skipping symbol substitution" subsys=elf symbol=cilium_egress_v4

Fixes: #16277
Signed-off-by: Divya Rani <a9173ecf809e810c00b34667cc6b7b949b575abf@gmail.com>

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