feat!: picodata expel --force to expel an online instance

Summary

• feat!: picodata expel --force to expel an online instance

This is a breaking change, because the default behavior has changed, an online instance will not be expelled with just picodata expel.

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• Close #1353 (closed)
• Cherry-pick to: none
• Docs follow-up: docs#470
• Changelog is updated