[Bug] Fix 4px spacing in fluid Dropdown

[Kritvi-bhatia17]

Detailed description

An unexpected 4px spacing is observed between the parent field and the menu list in the fluid dropdown component under the following states:

• State: Focus, Open: True, Selected: False (link)
• State: Focus, Open: True, Selected: True (link)

Steps to reproduce the issue

1. Navigate to the fluid dropdown component in the specified states.
2. Observe the 4px spacing between the parent field and the menu list.

Suggested fix

• The issue can be resolved by moving the _Dropdown menu list - Fluid input layer under the Dropdown menu overflow layer.

• Figma Review