chore(api)!: /v1/inspect only lists v1 apis by default (#3948)

# What does this PR do?
Allow filtering for v1alpha, v1beta, deprecated and v1. Backward
incompatible change since by default it only returns v1 apis now.

## Test Plan
added unit test

docs/static/llama-stack-spec.yaml

@@ -953,7 +953,22 @@ paths:
         List routes.
 
         List all available API routes with their methods and implementing providers.
-      parameters: []
+      parameters:
+        - name: api_filter
+          in: query
+          description: >-
+            Optional filter to control which routes are returned. Can be an API level
+            ('v1', 'v1alpha', 'v1beta') to show non-deprecated routes at that level,
+            or 'deprecated' to show deprecated routes across all levels. If not specified,
+            returns only non-deprecated v1 routes.
+          required: false
+          schema:
+            type: string
+            enum:
+              - v1
+              - v1alpha
+              - v1beta
+              - deprecated
       deprecated: false
   /v1/models:
     get: