Allow using APT to install Supervisor

[yzoug]

Two main reasons to prefer using apt:

• On Debian 12, installing supervisor with pip as a global package, like this role does, is no longer permitted.
• Pip needs compilers and other dangerous packages, that should not be installed if not needed.

A variable is introduced to allow for this, by default the role behaves as it did before, i.e. uses pip.

PS: love your videos Jeff! :)

[github-actions[bot]]

This pr has been marked 'stale' due to lack of recent activity. If there is no further activity, the issue will be closed in another 30 days. Thank you for your contribution!

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[github-actions[bot]]

This pr has been closed due to inactivity. If you feel this is in error, please reopen the issue or file a new issue with the relevant details.