VSCode code completion for provider declaration statement suggests invalid statement

**Bicep version**
Bicep CLI version 0.24.24

**Describe the bug**
Code completions for `provider` declaration statement is suggesting 'az@0.2.661' as a valid provider value, however, since the introduction of `az` provider dynamic loading, this is no longer valid. The valid value is `br/public:az@0.2.661'


**To Reproduce**
Steps to reproduce the behavior:
1. Install the VS or VSCode extension for v0.24.24
1. Create a test directory to store your main.bicep and bicepconfig.json
1. Create a bicepconfig.json with the following contents
```json
{
"experimentalFeaturesEnabled": {
"extensibility": true,
"dynamicTypeLoading": true
}
}
```
1. Create a new `main.bicep` file and type the following
```bicep
provider
```
1. You will get completions for provider values as shown below, the first entry is no longer valid and should yield `br/public:az@0.2.661`. The other entries are valid and can remain as is for now.

**Additional context**
Add any other context about the problem here.

Reproduce the completion in main.bicep using the bicepconfig.json from the report and the listed extensibility settings. Start from the VS or VSCode extension's provider completion behavior, then verify that the first suggestion uses br/public:az@0.2.661 while the other entries remain unchanged.

Written by the indexing model from the issue text.