Make getUrl return location of bucket if object is empty or null.

[MatejNedic]

:loudspeaker: Type of change

• [x] Bugfix
• [ ] New feature
• [ ] Enhancement
• [ ] Refactoring

:scroll: Description

:bulb: Motivation and Context

:green_heart: How did you test it?

:pencil: Checklist

• [ ] I reviewed submitted code
• [ ] I added tests to verify changes
• [ ] I updated reference documentation to reflect the change
• [ ] All tests passing
• [ ] No breaking changes

:crystal_ball: Next steps