Be quieter in expected shutdown cases (#3261)

* Be quieter in expected cases

* lets put this in the log file

* inline description use because setuptools entrypoint scripts are dumb

* Another setuptools entrypoint related issue

* maybe don't crash the bot on tasks

* improve the handling a bit more + document some of the lower level bits from the perspective of 'why?'

* Adding myself to codeowners on this one

* Let's not clobber our exit code

* And, there we go

* finish that thought

* right, I bumped the python version for (part of) this

* Update redbot/__main__.py

Co-Authored-By: jack1142 <6032823+jack1142@users.noreply.github.com>

* Okay, we should be good now

* correct exit code enum use

* cosmetic

* minor fix for linux and ctrl+c

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

redbot/setup.py

@@ -418,10 +418,15 @@ def backup(instance: str, destination_folder: Union[str, Path]) -> None:
     loop.run_until_complete(create_backup(instance, Path(destination_folder)))
 
 
-if __name__ == "__main__":
+def run_cli():
+    # Setuptools entry point script stuff...
     try:
         cli()  # pylint: disable=no-value-for-parameter  # click
     except KeyboardInterrupt:
         print("Exiting...")
     else:
         print("Exiting...")
+
+
+if __name__ == "__main__":
+    run_cli()