Moving the previous API documentation to the RKA section for the latest and 2.8 versions. Adjusted the titles and some wording, as well as updated the redirect for the latest versions.

Signed-off-by: Sunil Singh <sunil.singh@suse.com>

versioned_sidebars/version-2.8-sidebars.json

@@ -997,17 +997,6 @@
             "reference-guides/cli-with-rancher/kubectl-utility"
           ]
         },
-        {
-          "type": "category",
-          "label": "About the API",
-          "link": {
-            "type": "doc",
-            "id": "reference-guides/about-the-api/about-the-api"
-          },
-          "items": [
-            "reference-guides/about-the-api/api-tokens"
-          ]
-        },
         "reference-guides/rancher-cluster-tools",
         "reference-guides/rancher-project-tools",
         "reference-guides/system-tools",
@@ -1323,7 +1312,15 @@
             "api/workflows/projects"
           ]
         },
-        "api/api-reference"
+        "api/api-reference",
+        {
+          "type": "category",
+          "label": "Previous API Versions",
+          "items": [
+            "api/previous-rancher-api-versions/previous-rancher-api-versions",
+            "api/previous-rancher-api-versions/api-tokens"
+          ]
+        }
       ]
     },
     "contribute-to-rancher"