CI/CD: Improve builds/releases pipeline

[yveszoundi]

Background

Since 0.3.1, releases artifacts are assemble via the GitHub infrastructure (GitHub Actions), instead of using a local Ubuntu virtual machine. Please note that few pre-existing shell scripts are also reused in GitHub actions.

Problems

Existing shell scripts were built with an emphasis on supporting multiple architectures quickly (x86_64 and arm64)

• It can take lots of effort to support people experiencing local builds challenges for multiple reasons
• The way that scripts were initially assembled (and rationale behind it) can be frustrating when build errors arise
• The fact that local builds are only tested under an Ubuntu virtual machine; Supporting all kinds of users with their Linux distributions isn't possible
• Some configurations/decisions might require specific Linux or tooling knowledge
• Some other things just "suck" and didn't get refactored yet

Tasks

On top of items below, it would be nice to come closer to "reproducible builds" (containerized builds only help with parts of that).

• Review existing shell scripts
  • Evaluate opportunities to simplify logic
  • Review error handling and retries
  • Evaluate opportunities to make builds more flexible
  • Move scripting logic inside containers as much as possible
• Review container builder images default programs
  • Evaluate opportunities to trim container size
  • Remove duplicate or unrequired commands (symlinks, etc.)

[yveszoundi]

See also #79