Calling `set` with `_exist` is `false` does not run `delete`

[ThomasNieto]

Prerequisites

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Summary

Resources that support both set and delete does not call the correct operation when _exist is set to false.

I know if I were to create a config doc it would be called correctly but with rapid testing, I just change the payload from creating to deleting by setting the _exist property instead of changing the set to delete.

Steps to reproduce

1. Create resource with set and delete operations and _exist canonical property.
2. Call dsc resource set with (@{ _exist = $false} | ConvertTo-Json)

Expected behavior

The resource is deleted

Actual behavior

The resource is not deleted

Error details

Environment data

7.6.0-preview.5

Version

dsc 3.2.0-preview.8

Visuals

No response