Add statically compiled protoc to release artifacts

[malt3]

What language does this apply to?

n/a

Describe the problem you are trying to solve.

protoc is a common build tool in different environments, including bazel projects via rules_proto.
Protoc depends on gnu standard libraries at runtime:

ldd /home/USER/.cache/bazel/_bazel_USER/f83094fca0f0f2ee3451f9caccc3e2f4/execroot/__main__/bazel-out/k8-opt-exec-2B5CBBC6/bin/external/com_google_protobuf_protoc_linux_x86_64/protoc.exe
        linux-vdso.so.1 (0x00007fffb5bb3000)
        libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007f3627ff3000)
        libm.so.6 => /usr/lib/libm.so.6 (0x00007f3627f13000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f3627c00000)
        libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007f3627ef9000)
        libc.so.6 => /usr/lib/libc.so.6 (0x00007f3627800000)
        /lib64/ld-linux-x86-64.so.2 => /lib64/ld-linux-x86-64.so.2 (0x00007f3627ffa000)

Some environments do not provide a glibc and libstc++ globally. Those include alpine linux and NixOS.
Using rules_proto / protoc in those environments is very hard and requires custom patches.

Describe the solution you'd like

Release artifacts of this repository should either be compiled statically by default or an extra, static version of the release artifacts should be added.
I tried this quickly by patching the bazel workspace of this repository to use musl and link protoc statically and it works.

Describe alternatives you've considered

Alternatively, users of protoc have to provide their own protoc binary which leads to outdated versions of protoc being vendored.

Additional context
Add any other context or screenshots about the feature request here.