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 <ranidivya063@gmail.com>

pkg/datapath/loader/cache.go

@@ -61,6 +61,7 @@ var ignoredELFPrefixes = []string{
 	"cilium_ipv4_frag_datagrams", // Global
 	"cilium_ipmasq",              // Global
 	"cilium_throttle",            // Global
+	"cilium_egress_v4",           // Global
 	"from-container",             // Prog name
 	"to-container",               // Prog name
 	"from-netdev",                // Prog name