Fixing a small issue with the clean.sh script

[Chambras]

Description

A small fix in the clean.sh script to use the SP AppID instead of the SP display name to delete it.

Issue reference

NA

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• [ x] Code compiles or validates correctly
• [ x] BASH scripts have been validated using shellcheck
• [ x] All tests pass (manual and automated)
• [ x] The documentation is updated to cover any new or changed features
• [ x] Markdown files have been linted using the recommended linter. (See .vscode/extensions.json.)
• [ x] Relevant issues are linked to this PR

[brooke-hamilton]

Thank you, this fixed the issue with deleting SPs.