fix width overflow issue in quiet picker

[pr7prashant]

Closes #4912

✅ Pull Request Checklist:

• Included link to corresponding React Spectrum GitHub Issue.
• Added/updated unit tests and storybook for this change (for new code or code which already has tests).
• Filled out test instructions.
• Updated documentation (if it already exists for this component).
• Looked at the Accessibility Practices for this feature - Aria Practices

📝 Test Instructions:

• If you create a picker that is isQuiet and does not have a label, there should not be a large space between the text and the caret.
• This can be tested in the new added story Picker/Quiet

🧢 Your Project:

Adobe - DX - Campaign

[reidbarber]

GET_BUILD

[rspbot]

Build successful! 🎉

• View the storybook
• View the storybook-17
• View the storybook-16
• View the documentation

[rspbot]

## API Changes

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[reidbarber]

LGTM, we will need to run chromatic after this change. Also, note to team, let's hold off on merging until after release.

[snowystinger]

Ran chromatic, looks good