Changes for V2 primitives MVP2 (Qiskit#1088)

Closes Qiskit#1083 
Closes Qiskit#1130 

Changes can be viewed here:
https://qiskit-docs-preview-pr-1088.1799mxdls7qz.us-south.codeengine.appdomain.cloud/api/migration-guides/qiskit-runtime

FYI @jyu00 @ElePT

---------

Co-authored-by: Jessie Yu <jessieyu@us.ibm.com>
Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com>

docs/api/migration-guides/_toc.json

@@ -35,16 +35,28 @@
         "title": "Migrate to Qiskit Runtime",
         "children": [
           {
-            "title": "How to migrate",
+            "title": "Overview",
             "url": "/api/migration-guides/qiskit-runtime"
           },
           {
-            "title": "Examples",
-            "url": "/api/migration-guides/qiskit-runtime-examples"
+            "title": "Migrate from qiskit-ibmq-provider",
+            "url": "/api/migration-guides/qiskit-runtime-from-ibmq-provider"
+          },
+          {
+            "title": "Migrate from qiskit-ibm-provider",
+            "url": "/api/migration-guides/qiskit-runtime-from-ibm-provider"
+          },
+          {
+            "title": "Migrate options",
+            "url": "/api/migration-guides/qiskit-runtime-options"
+          },
+          {
+            "title": "Common use cases",
+            "url": "/api/migration-guides/qiskit-runtime-use-case"
           },
           {
-            "title": "qiskit_ibm_provider to qiskit_ibm_runtime",
-            "url": "/api/migration-guides/qiskit-runtime-from-provider"
+            "title": "End-to-end examples",
+            "url": "/api/migration-guides/qiskit-runtime-examples"
           }
         ]
       },

docs/api/migration-guides/index.mdx

@@ -13,9 +13,12 @@ These migration guides help you more effectively use Qiskit and Qiskit Runtime:
    * [Qiskit 1.0 feature changes](/api/migration-guides/qiskit-1.0-features)
 * [Migrate to the Qiskit Runtime V2 primitives](/api/migration-guides/v2-primitives)
 * Migrate to Qiskit Runtime
-   * [How to migrate](./qiskit-runtime)
+   * [Overview](./qiskit-runtime)
+   * [Migrate from `qiskit-ibmq-provider`](./qiskit-runtime-from-ibmq-provider)
+   * [Migrate from `qiskit_ibm_provider`](./qiskit-runtime-from-ibm-provider)
+   * [Migrate options](./qiskit-runtime-options)
+   * [Common use cases](./qiskit-runtime-use-case)
    * [Examples](./qiskit-runtime-examples)
-   * [Migrate `backend.run()` from `qiskit_ibm_provider` to `qiskit_ibm_runtime`](./qiskit-runtime-from-provider)
 * [Migrate from cloud simulators to local simulators](/api/migration-guides/local-simulators)
 * Qiskit 0.44 changes
    * [`qiskit.algorithms` new interface](./qiskit-algorithms-module)