refactor: rename --console-sock to --admin-sock

Summary

• Rename picodata run --console-sock option to --admin-sock
• Provide a default value <data_dir>/admin.sock

---

• Close #455 (closed)
• Follow-up for #427 (closed)
• Target branch: master
• Changes should be cherry-picked to 23.12: no
• Docs follow-up: docs#149 (closed)