fix(app-cmds): unfocused options not getting passed in autocomplete callback

[DenverCoder1]

Summary

Fixes #1045

Bug:

from_autocomplete_callback is not getting called and autocomplete_options is not getting populated when autocomplete_callback is supplied to a SlashOption rather than using the decorator. This causes other options from the command to be inaccessible from the autocomplete callback method (see linked issue).

Fix:

Replaces iscoroutinefunction check in SlashCommandOption with a call to self.from_autocomplete_callback(self.autocomplete_callback) which includes the iscoroutinefunction check and also populates the autocomplete_options field to have the other options in the command so they can be accessed later when the callback is called (see from_autocomplete_callback).

Checklist

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
  • I have run task pyright and fixed the relevant issues.
• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)