feat(embedded): Embed Charts using GuestToken similar to SIP-75

[jayakrishnankk]

SUMMARY

Associated SIP -> #30075

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TODO

TESTING INSTRUCTIONS

Ensure EMBEDDED_SUPERSET is enabled in the config.

ADDITIONAL INFORMATION

• [x] Has associated issue: #30075
• [x] Required feature flags: EMBEDDED_SUPERSET=True
• [x] Changes UI: Adds a menu option in the Explore view of the chart to embed chart
• [x] Includes DB Migration (follow approval process in SIP-59)
  • [?] Migration is atomic, supports rollback & is backwards-compatible
  • [ ] Confirm DB migration upgrade and downgrade tested
  • [ ] Runtime estimates and downtime expectations provided
• [x] Introduces new feature or API
• [ ] Removes existing feature or API