Allow disabling feedback command when using sentry extension

[kimcore]

Summary

Allow disabling feedback command when using sentry extension.

Current Behaviour

Currently, we can't disable the feedback command if the sentry extension is enabled.

Preferred Behaviour

Users should be able to choose whether to create a feedback command or not.

Suggestions

Expose a field in SentryExtensionBuilder, and check for that field in ExtensibleBot.addDefaultExtensions.

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[gdude2002]

Done - this'll be available as the feedbackExtension Boolean prop in the sentry builder once the snapshot builds.

Note that feedbackExtension will be ignored if the Sentry integration is disabled.