Rename runtime to src (#8842)

* Renamed runtime to src

* Removed old paths

* Fixed cmake

* Fixed doc

.github/dependabot.yml

@@ -4,7 +4,7 @@ version: 2
 updates:
   # Enable version updates for nGraph Python API
   - package-ecosystem: pip
-    directory: "/runtime/bindings/python"
+    directory: "/src/bindings/python"
     schedule:
       interval: weekly
       day: monday