bpf: PR target/113453 func_info .BTF.ext implementation

Hi everyone, Just an updated version of the patches based on recent reviews from David Faust. Thanks for the feedback. Regards, Cupertino

bpf: PR target/113453 func_info .BTF.ext implementation

Good morning, This is a patch series with the implementation of func_info region within bpf target .BTF.ext section. Considering the required changes it also implied some changes in BTF and in the original CO-RE implementation, more specifically the structure used and how the relocations were crea