Group googleapis update (#5772)

This PR makes the renovate bot combine the googleapis update PRs into
one.

Example: https://github.com/XSAM/otelsql/pull/347

renovate.json

@@ -19,6 +19,10 @@
       "matchManagers": ["gomod"],
       "matchDepTypes": ["indirect"],
       "enabled": false
+    },
+    {
+      "matchPackageNames": ["google.golang.org/genproto/googleapis/**"],
+      "groupName": "googleapis"
     }
   ]
 }