fix: harmonize all tools helper scripts for macOS

[sgaist]

Summary

Harmonize the tools helper scripts so that pack installation works in all cases.

Currently, running integration tests does not work on macOS as pack fails to download.

The builder and stack tools helper scripts already had the fix to install pack on macOS.

This patch harmonizes that.

Use Cases

Run integration tests on macOS while developing buildpacks

Checklist

• I have viewed, signed, and submitted the Contributor License Agreement.
• I have linked issue(s) that this PR should close using keywords or the Github UI (See docs)
• I have added an integration test, if necessary.
• I have reviewed the styleguide for guidance on my code quality.
• I'm happy with the commit history on this PR (I have rebased/squashed as needed).

[pacostas]

Can you please explain how this argument fixes your error because I cant see any scenario for macos on the util:tools::os funcions for the implementation

github-config/implementation/scripts/.util/tools.sh

Lines 9 to 23 in e30ff49

	function util::tools::os() {
	case "$(uname)" in
	"Darwin")
	echo "${1:-darwin}"
	;;
	"Linux")
	echo "linux"
	;;
	*)
	util::print::error "Unknown OS \"$(uname)\""
	exit 1
	esac
	}

and for the language family buildpacks

github-config/language-family/scripts/.util/tools.sh

Lines 9 to 23 in e30ff49

	function util::tools::os() {
	case "$(uname)" in
	"Darwin")
	echo "${1:-darwin}"
	;;
	"Linux")
	echo "linux"
	;;
	*)
	util::print::error "Unknown OS \"$(uname)\""
	exit 1
	esac
	}

[pacostas]

Can you please explain how this argument fixes your error because I cant see any scenario for macos on the util:tools::os funcions for the implementation

github-config/implementation/scripts/.util/tools.sh

Lines 9 to 23 in e30ff49

	function util::tools::os() {
	case "$(uname)" in
	"Darwin")
	echo "${1:-darwin}"
	;;
	"Linux")
	echo "linux"
	;;
	*)
	util::print::error "Unknown OS \"$(uname)\""
	exit 1
	esac
	}

and for the language family buildpacks

github-config/language-family/scripts/.util/tools.sh

Lines 9 to 23 in e30ff49

	function util::tools::os() {
	case "$(uname)" in
	"Darwin")
	echo "${1:-darwin}"
	;;
	"Linux")
	echo "linux"
	;;
	*)
	util::print::error "Unknown OS \"$(uname)\""
	exit 1
	esac
	}

Actaully now I see, you are right. Im approving it right away