docs: provider and distro codegen migration (#3531)

# What does this PR do?

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- Updates provider and distro codegen to handle the new format
- Migrates provider and distro files to the new format

## Test Plan

- Manual testing

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docs/docs/providers/inference/remote_watsonx.mdx

@@ -0,0 +1,28 @@
+---
+description: "IBM WatsonX inference provider for accessing AI models on IBM's WatsonX platform."
+sidebar_label: Remote - Watsonx
+title: remote::watsonx
+---
+
+# remote::watsonx
+
+## Description
+
+IBM WatsonX inference provider for accessing AI models on IBM's WatsonX platform.
+
+## Configuration
+
+| Field | Type | Required | Default | Description |
+|-------|------|----------|---------|-------------|
+| `url` | `<class 'str'>` | No | https://us-south.ml.cloud.ibm.com | A base url for accessing the watsonx.ai |
+| `api_key` | `pydantic.types.SecretStr \| None` | No |  | The watsonx API key |
+| `project_id` | `str \| None` | No |  | The Project ID key |
+| `timeout` | `<class 'int'>` | No | 60 | Timeout for the HTTP requests |
+
+## Sample Configuration
+
+```yaml
+url: ${env.WATSONX_BASE_URL:=https://us-south.ml.cloud.ibm.com}
+api_key: ${env.WATSONX_API_KEY:=}
+project_id: ${env.WATSONX_PROJECT_ID:=}
+```