fix(api): Return correct workflow.origin

[SokratisVidros]

What changed? Why was the change needed?

There are three origins:

1. V1 Workflows defined in Novu Cloud (will be deprecated soon)
2. V2 Workflows defined in Novu Cloud
3. V2 Workflows defined in code via @novu/framework

The Dashboard will redirect to the appropriate workflow editor according to its origin.

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commit: adbcf15