renovatebot: Extend from local presets

renovate.json

@@ -1,6 +1,11 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": ["config:base", ":dependencyDashboard"],
+  "extends": [
+    "config:base",
+    ":dependencyDashboard",
+    "local>iac/renovate-config",
+    "local>iac/renovate-config//automerge-common"
+  ],
   "regexManagers": [
     {
       "fileMatch": [
@@ -22,10 +27,8 @@
     {
       "matchPackageNames": [
         "github.com/julienschmidt/httprouter",
-        "github.com/go-sql-driver/mysql",
         "github.com/miekg/dns",
         "github.com/rivo/tview",
-        "golang.org/x/oauth2",
         "gopkg.in/asn1-ber.v1"
       ],
       "automerge": true,