[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

Inizia con l’estrazione di Workspace e con il YAML di esempio di Publisher Configuration descritti nei passaggi per la riproduzione, quindi confronta le variabili esportate con i valori utilizzati durante la distribuzione nell’APIM di destinazione. L’attività è completata quando vengono identificati gli overload keys richiesti e viene confermato che namedValues e serviceUrls vengono applicati invece dei valori dell’APIM di origine.

Scritto dal modello di indicizzazione a partire dal testo della issue.