Drop --with-cflags gRPC argument from Raspberry Pi build
Linking libraries in gcc isn't necessary, and this change allows the Raspberry Pi builds to work. It works around a bug with bundler v1.17.3 and RubyGems v3.x: https://github.com/rubygems/bundler/pull/7023
Fixes #5767 (closed)
https://dev.gitlab.org/gitlab/omnibus-gitlab/-/jobs/8935668 is a test build with this change.
Edited by Stan Hu