Nested resource type completion is done inconsistent with root resource completion

**Bicep version**
VS Code v0.4.1008

**Describe the bug**
When auto completing resource types for root resoruces, auto completion is done in two parts - one to choose the resource ytpe, and then a second completion for hte version. However when completing the type for a nested resource, auto completion is done in one go. I'd expect the nested resource completion to also be done in two phases.


**To Reproduce**
Start auto completion at the `|` character in the below sample (as shown in screenshot above)
```bicep
resource site 'Microsoft.Web/sites@2021-02-01' = {
name: 'site'

resource child |
}
}
```

**Additional context**
When auto completing resources for root resources, intellisense is split into two parts - one for hte resource type, and a second for the version

Reproduce the issue in VS Code using the Bicep sample in the report, then compare root-resource and nested-resource completion behavior. Trace the completion entry point involved in each case and verify the nested flow is split into resource type and version phases; done means both completion paths behave consistently.

Written by the indexing model from the issue text.