Add release notes for v3.27.4

release-notes/v3.27.4-release-notes.md

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+08 Jul 2024
+
+#### Bug fixes
+
+ - Fix calico-felix rpm libpcap.so linking dependency. [calico #8986](https://github.com/projectcalico/calico/pull/8986) (@hjiawei)
+ - Upgrade bpftool to v7.4 to fix the issue of loading XDP programs in iptables data plane that happens in few distributions. [calico #8940](https://github.com/projectcalico/calico/pull/8940) (@mazdakn)
+ - ebpf: fix - let the node handle packet when we are not sure about the destination [calico #8926](https://github.com/projectcalico/calico/pull/8926) (@tomastigera)
+ - ebpf: fixed cleaning of programs and map when switching from ebpf to iptables mode. [calico #8888](https://github.com/projectcalico/calico/pull/8888) (@tomastigera)
+ - Fix errors on kernels that don't support the XFRM netlink family. [calico #8872](https://github.com/projectcalico/calico/pull/8872) (@fasaxc)
+ - ebpf: Update map definition in sockops program to let libbpf v1.0+ load them successfully. [calico #8702](https://github.com/projectcalico/calico/pull/8702) (@mazdakn)
+ - ebpf: fix natOutgoing SNAT for icmp6 [calico #8686](https://github.com/projectcalico/calico/pull/8686) (@tomastigera)
+ - Improve cni-plugin binary install verification. [calico #8841](https://github.com/projectcalico/calico/pull/8841) (@ialidzhikov)
+
+#### Other changes
+
+ - Update go version to v1.22.4, kubernetes version to v1.27.15, UBI version to v8.10 [calico #8937](https://github.com/projectcalico/calico/pull/8937) (@coutinhop)
+ - ebpf: support for service loop prevention [calico #8893](https://github.com/projectcalico/calico/pull/8893) (@sridhartigera)
+ - ebpf: cleanup BPF special devices when BPF is turned off [calico #8891](https://github.com/projectcalico/calico/pull/8891) (@tomastigera)