[BluePrint] - Parent , source and destination node types in dropdown should be unique ( for safety we should put check on frontend side too )

[MahtabBukhari]

Bug:

• Parent , source and destination node types in dropdown showing multiple times that should be only once

Evidence:

https://www.loom.com/share/3d3ecee12bbd493e98424fe016fdaac0?sid=cfe5f114-be19-4569-a1b5-ebb0684d303e

Acceptance Criteria:

• [ ] Parent , source and destination node types in dropdown should be unique

[MahtabBukhari]

@tomsmith8 Could you please assign me?