CreateDatasetUseCaseImpl: allows create a dataset that has duplicate inputs

[s373r]

Describe the bug

.

Steps To Reproduce

1. Create a workspace

kamu init

2. Create snapshots with content:

# root.yaml
kind: DatasetSnapshot
version: 1
content:
  name: root
  kind: Root
  metadata: [ ]

# deriv.yaml
kind: DatasetSnapshot
version: 1
content:
  name: deriv
  kind: Derivative
  metadata:
    - kind: SetTransform
      inputs:
        - datasetRef: root
        - datasetRef: root
      transform:
        kind: Sql
        engine: some_engine
        queries:
          - query: select * from input

3. Add the snapshots to the workspace:

kamu add root.yaml
kamu add deriv.yaml

Current Behavior

deriv added

Expected Behavior

Error that deriv contains identical inputs (which 99% means copypaste error)

kamu system info

The latest version at the moment (0.220.0)

Logs

No response

Anything else?

No response