Add API endpoint to get latest release (#21267)

This PR adds a new API endpoint to get the latest stable release of a
repo, similar to [GitHub
API](https://docs.github.com/en/rest/releases/releases#get-the-latest-release).

templates/swagger/v1_json.tmpl

@@ -9776,6 +9776,42 @@
         }
       }
     },
+    "/repos/{owner}/{repo}/releases/latest": {
+      "get": {
+        "produces": [
+          "application/json"
+        ],
+        "tags": [
+          "repository"
+        ],
+        "summary": "Gets the most recent non-prerelease, non-draft release of a repository, sorted by created_at",
+        "operationId": "repoGetLatestRelease",
+        "parameters": [
+          {
+            "type": "string",
+            "description": "owner of the repo",
+            "name": "owner",
+            "in": "path",
+            "required": true
+          },
+          {
+            "type": "string",
+            "description": "name of the repo",
+            "name": "repo",
+            "in": "path",
+            "required": true
+          }
+        ],
+        "responses": {
+          "200": {
+            "$ref": "#/responses/Release"
+          },
+          "404": {
+            "$ref": "#/responses/notFound"
+          }
+        }
+      }
+    },
     "/repos/{owner}/{repo}/releases/tags/{tag}": {
       "get": {
         "produces": [