Use matrix with parametrized ci.yaml for future os upgrades

[mpenny-github]

This is the first PR in a series to add support for running glb-director on ubuntu noble. This PR uses the matrix option in the ci action to build over a list of operating systems. The current list is only the existing focal distro. Noble will be added in a future commit.

It also updates the script/helpers/folding.sh to use github action style folding macros.

[Copilot]

Pull request overview

This PR prepares the CI pipeline for future Ubuntu distro upgrades by switching the GitHub Actions workflow to a matrix-driven build (currently only focal) and consolidating the package build script to accept a distro parameter. It also updates log folding to use GitHub Actions’ native grouping commands.

Changes:

• Convert .github/workflows/ci.yml to a matrix.distro strategy and parameterize artifact naming per distro.
• Replace the focal-specific package build script with a single script/cibuild-create-packages entrypoint that accepts a distro argument (defaulting to focal).
• Update script/helpers/folding.sh to emit ::group:: / ::endgroup:: markers for GitHub Actions log folding.

Show a summary per file

File	Description
script/helpers/folding.sh	Switches folding markers to GitHub Actions grouping commands.
script/cibuild-create-packages-focal	Removes the focal-only package build wrapper script.
script/cibuild-create-packages	Adds a DISTRO argument (default focal) and uses it to select the Dockerfile/image tag.
.github/workflows/ci.yml	Introduces a distro matrix and distro-specific tar/artifact names.

Copilot's findings

Tip

Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

• Files reviewed: 4/4 changed files
• Comments generated: 2