[Enhancement Request] Support for Linux ppc64 + ppc64le

**Describe the enhancement:**

[Posting behalf of customer from original request raised here - https://github.com/elastic/ebpf/issues/205

Would it be possible to add in support for both the ppc64 and ppc64le arch types since both architectures seem to be supported by the underlying github.com/cilium/ebpf library.

I understand that Elastic doesn't support Beats/Agent on these architectures, the lack of support for these architectures in this module now means that we can no longer cross-compile any beats that includes ebpf functionality (and therefore Agent) for those architectures ourselves.

**Describe a specific use case for the enhancement or feature:**

No file or test is named. Start by tracing the Beats eBPF integration and its github.com/cilium/ebpf dependency for architecture gates, then inspect the cross-compilation path for ppc64 and ppc64le. Done means those Linux architectures are accepted wherever this module currently rejects them and the relevant cross-compilation checks pass.

Written by the indexing model from the issue text.