Directory listing in Ubuntu and macOS workflows

[graemenail]

Description

The windows workflow includes a directory listing of the executables. This PR adds the same to the Ubuntu and macOS workflows. Perhaps useful to check for any unforeseen increases in binary size (as in #937).

List of changes:

• Adds ls command to Ubuntu & macOS workflows

Added dependencies: none

How to test

Ran on CI in fork

Checklist

• [x] I have tested the code manually
• [ ] I have run regression tests
• [ ] I have read and followed CONTRIBUTING.md
• [ ] I have updated CHANGELOG.md