Locally download and use libbpf dependencies

[kakkoyun]

Why?

After libbpf started requiring zstd as a dependency, my system can't build libbpf locally. That's why I have started changes. (Thanks @javierhonduco, for the pointers).

This is a first step towards to system-independent way of reproducibly building our binary. This will also simplify our CI dependencies. We need to enhance the script to handle cross-platform builds and configure goreleaser accordingly.

related: #1304

What?

🤖 Generated by Copilot at f5b7e98

This pull request adds support for building the parca-agent binary with static libraries for libbpf and its dependencies. It introduces a new script scripts/download-and-build-libbpf-deps.sh and modifies the Makefile and the Tiltfile accordingly. This enables the parca-agent binary to run on systems without dynamic libraries for libbpf.

How?

🤖 Generated by Copilot at f5b7e98

• Define and use variables for libbpf dependencies in Makefile (link, link, link, link, link)
• Add a new script scripts/download-and-build-libbpf-deps.sh to download and build the static libraries for libbpf dependencies (link)
• Remove an empty line from Tiltfile (link)

Original work: https://github.com/javierhonduco/rbperf/blob/573ebc0a90f05ca0ef9b26ae7825d27468035cf1/tools/build_deps#L8

TODO

• Make sure cross-compilation works with goreleaser
• Handle Set versions of C dependencies and compile with frame pointers #1304

[maxbrunet]

It'd be nice if C dependencies had their own package manager (I mean an other option from Bash or Make or Nix), like:

• Conan
• vcpkg

But none of them has support for our libraries 😞

[javierhonduco]

Looks good -- Before we merge this, could we check that:

• the generated arm64 artefact works fine in CI;
• local "native" (without x-compilation) arm64 builds work;

Was the scripts/local-dev-cluster.sh file created by accident? 😄