chore: improve ac release automation (#2186)

- Modify renovate rules so each AC chart groups prs for each chart, will
allow us to maintain the current testing.
- Add renovate rules to bump chart dependencies that are not declared
under chart dependencies due to how AC deployment works

example of how it would look like
https://github.com/gsanchezgavier/helm-charts/pulls

Author: gsanchezgavier

.github/renovate.json5

@@ -3,6 +3,17 @@
     "github>newrelic/k8s-agents-automation:renovate-base.json5"
   ],
   "bumpVersion": "patch",
+  "customManagers": [
+    {
+      "customType": "regex",
+      "fileMatch": ["charts/agent-control-bootstrap/Chart.yaml"],
+      "datasourceTemplate": "helm",
+      "registryUrlTemplate": "https://helm-charts.newrelic.com",
+      "matchStrings": [
+        "# renovate: chartName=(?<depName>\\S+)\\n[^:]+: (?<currentValue>\\S+)"
+      ]
+    }
+  ],
   "packageRules": [
     // This is a shared repository where it is not clear that generic rules apply
     // Making rules per folders or properties runs the risk that future 
@@ -59,7 +70,7 @@
     {
       // Auto-bump chart version when Renovate updates chart values files. These updates
       // are usually container tag updates.
-      "matchFileNames": ["charts/*/values.yaml"],
+      "matchFileNames": ["charts/*/values.yaml", "charts/*/Chart.yaml"],
       "bumpVersions": [
         {
           "filePatterns": ["{{packageFileDir}}/Chart.{yaml,yml}"],
@@ -69,11 +80,14 @@
       ]
     },
     {
-      "matchFileNames": [
-        "charts/agent-control-deployment/**",
-        "charts/agent-control-bootstrap/**"
-      ],
-      "groupName": "agent-control release"
+      "matchFileNames": ["charts/agent-control-deployment/**"],
+      "groupName": "agent-control-deployment dependencies",
+      "groupSlug": "agent-control-deployment-dependencies"
+    },
+    {
+      "matchFileNames": ["charts/agent-control-bootstrap/**"],
+      "groupName": "agent-control-bootstrap dependencies",
+      "groupSlug": "agent-control-bootstrap-dependencies"
     }
   ]
 }

charts/agent-control-bootstrap/Chart.yaml

@@ -4,10 +4,10 @@ description: Bootstraps New Relic' Agent Control
 
 type: application
 version: 1.7.0
-# agent-control-deployment chart default version.
+# renovate: chartName=agent-control-deployment
 appVersion: 1.6.0
 annotations:
-  # agent-control-cd chart default version.
+  # renovate: chartName=agent-control-cd
   agentControlCdVersion: 1.0.0