fix: retain non-ascii characters in result sets

[rusackas]

SUMMARY

Hopefully this will leave Chinese characters alone, rather than converting them to ascii representations of unicode characters.

Fixes: https://github.com/apache/superset/issues/19388 Fixes: https://github.com/apache/superset/issues/19982 Fixes: https://github.com/apache/superset/issues/22904

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• [ ] Has associated issue:
• [ ] Required feature flags:
• [ ] Changes UI
• [ ] 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
• [ ] Introduces new feature or API
• [ ] Removes existing feature or API