Explore adding GitHub actions matrix instead of separate workflows

[techthoughts2]

Description

GitHub actions supports a matrix construct for jobs. This may be more efficient than having entirely separate workflows setup for multiple OS module testing.

Describe the solution you'd like

Test and evaluate if matrix is a better fit for cross-platform module testing than separate GA workflows per platform.

[techthoughts2]

This is not currently possible due to:

matrix job does not support to set shell as configuration options

shell: ${{ matrix.shell }} fails ❌ .

Reference: https://github.com/orgs/community/discussions/25544

Open Feature for this capability: actions/runner#444