Extract binary compilation steps from CI YAML file to a shared script

Overview

The following discussion from !4129 (merged) should be addressed:

• @ddieulivol started a discussion: (+1 comment)

  suggestion (non-blocking): WDYT of extracting those steps to a script? I see that they are fairly similar between gitaly and gitlab shell for instance (can be done in follow-up if we want to do it).

Impacted categories

The following categories relate to this issue:

• gdk-reliability - e.g. When a GDK action fails to complete.
• gdk-usability - e.g. Improvements or suggestions around how the GDK functions.
• gdk-performance - e.g. When a GDK action is slow or times out.

Steps to replicate (optional)

Proposal (optional)

Environment (optional)

• Operating system name: <!-- output of `uname -a` command -->
• Architecture: <!-- output of `arch` command -->
• The contents of your gdk.yml (if any)
• Ruby version: <!-- output of `ruby --version` command -->
• GDK version: <!-- output of `git rev-parse --short HEAD` command -->