[Templates] can we chose between appsettings and parameters?

### Describe the Bug with repro steps

Instead of getting all env-specific values as params, is it possible to support appsettings as well?

one reason (there are many) for this is, how do we refer ex KeyVault here without avoiding

params.json:

```
"queueName_secret": {
"type": "securestring",
"value": "@appsetting('secretQueuename')"
},
```

maybe this is possible or solvable in other ways - if so please let me know

### What type of Logic App Is this happening in?

Standard (Portal)

### Which operating system are you using?

Windows

### Are you using new designer or old designer

New Designer

### Did you refer to the TSG before filing this issue? [https://aka.ms/lauxtsg]()

Yes

### Workflow JSON

*No response*

### Screenshots or Videos

*No response*

### Browser

chrome

### Additional context

*No response*