Add check for TESTS edge for Functions

[tomsmith8]

Task

Add check for TESTS edge for node_type Function

• Move Create bounty to + menu
• Rename to Generate Test

Render item:

• Select Function
• call /graph/edges with ref_id
• If the response includes INCOMING TESTS Edge, then hide the button
• Else, render the Generate Test action

[aliraza556]

@tomsmith8 Please assign me

[MuhammadUmer44]

@tomsmith8 assign me?

[MirzaHanan]

@tomsmith8 I can help?