feat: simplify renovate config (#347)

Disable regular updates, because they did not work as expected, only security updates are kept.
Removed configuration for go version, since it did not work as we need.
Removed grouping of the dependency PRs, since it complicated the bumping of the dependencies

Signed-off-by: Karel Simon <ksimon@redhat.com>

renovate.json

@@ -9,8 +9,6 @@
     "release-0.34"
   ],
   "prConcurrentLimit": 3,
-  "groupName": "all dependencies",
-  "groupSlug": "all",
   "lockFileMaintenance": {
     "enabled": false
   },
@@ -25,41 +23,21 @@
     "hack/**",
     "manifests/**"
   ],
+  "postUpdateOptions": ["gomodTidy"],
   "packageRules": [
     {
-      "groupName": "all dependencies on main",
-      "matchBaseBranches": [
-        "main"
-      ],
-      "matchPackagePatterns": [
-        "*"
-      ]
-    },
-    {
-      "groupName": "only security dependencies on stable",
+      "groupName": "all dependencies",
+      "groupSlug": "all",
       "enabled": false,
-      "matchBaseBranches": [
-        "release-0.34"
-      ],
       "matchPackagePatterns": [
         "*"
       ]
-    },
-    {
-      "matchPackageNames": [
-        "golang",
-        "go"
-      ],
-      "allowedVersions": "<=1.22",
-      "matchBaseBranches": [
-        "release-0.34"
-      ]
     }
   ],
   "vulnerabilityAlerts": {
     "enabled": true
   },
   "osvVulnerabilityAlerts": true,
   "assigneesFromCodeOwners": true,
-  "separateMajorMinor": false
+  "separateMajorMinor": true
 }