[renovate] move ownership for faker to team:kibana-visualizations (#202329)

## Summary

@markov00 opened PR to
[migrate](https://github.com/elastic/kibana/pull/201105) from `faker`,
but it probably will take extra time and to keep track let's move its
ownership to `team:kibana-visualizations`

---------

Co-authored-by: Marco Vettorello <vettorello.marco@gmail.com>

renovate.json

@@ -137,12 +137,10 @@
       "groupName": "@elastic/appex-qa dependencies",
       "matchDepNames": [
         "cheerio",
-        "@types/faker",
         "@types/pixelmatch",
         "@types/pngjs",
         "@types/supertest",
         "babel-plugin-istanbul",
-        "faker",
         "nyc",
         "oboe",
         "pixelmatch",
@@ -377,6 +375,26 @@
       "enabled": true,
       "minimumReleaseAge": "7 days"
     },
+    {
+      "groupName": "@elastic/kibana-visualizations test dependencies",
+      "matchDepNames": [
+        "@types/faker",
+        "faker"
+      ],
+      "reviewers": [
+        "team:visualizations"
+      ],
+      "matchBaseBranches": [
+        "main"
+      ],
+      "labels": [
+        "Team:Visualizations",
+        "release_note:skip",
+        "backport:prev-minor"
+      ],
+      "enabled": true,
+      "minimumReleaseAge": "7 days"
+    },
     {
       "groupName": "@elastic/charts",
       "matchDepNames": [