[Fluent] DraggableLine, SpinButton/FLoatLineComponent, FileUploadLine with icon for NME

[georginahalpern]

• split up floatLineComponent into usage of spinbutton/numberinput, parsing props to send proper precision/step values
• condense draggableLine and draggableLineWithButton (only the delete button being used)
• upload fileUploadLine UX

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