[BUG] Workspace Publisher YAML File overload variables ignored

### Release version

v6.0.0.2-alpha.1.0.3

### Describe the bug

Hello team,

Can we get a sample publisher file for workspace configuration publishing?

I've been trying for the last couple of hours to overload namedValues or serviceUrls of the APIs inside the Workspaces, but to no success.

The regular sample YAML publisher file seems to not apply for Workspaces scenarios and the values inside of it are ignored by the publisher tool. What keys should we use within it to make the publisher tool aware of the values that need overloading?

Thank you!

### Expected behavior

YAML Publisher configuration values are not ignored on APIM and the destination APIM is updated with the correct values

### Actual behavior

The APIs and NamedValues get deployed in the Workspace with the values extracted from source APIM.

### Reproduction Steps

Using the Workspace supported ApiOps Toolkit extract a Workspace.

Try to overload the exported variables with the sample provided Publisher Configuration YAML

Comienza con la extracción de Workspace y el YAML de ejemplo de Publisher Configuration descritos en los pasos de reproducción; después, compara sus variables exportadas con los valores utilizados durante el despliegue en el APIM de destino. Se considera terminado cuando se hayan identificado las claves overload requeridas y se haya confirmado que namedValues y serviceUrls se aplican en lugar de los valores del APIM de origen.

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