feat(stm32CubeProg): Don’t hardcode Homebrew prefix

[ndoo]

Summary

Instead, use brew --prefix.

This PR fixes/implements the following bugs/features

• [x] Feature: Allows stm32CubeProg.sh to detect gnu-getopt binary/PATH when Homebrew was installed in a non-default prefix.

Validation

• Ensure CI build is passed.
• Demonstrate the code is solid.

Code formatting

• Ensure AStyle check is passed thanks CI

Closing issues

N/A