chore(kubelet-csr-approver): Write own code for CSR approver (#23799)

**Description**
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Please include a summary of the change and which issue is fixed. Please
also include relevant motivation and context. List any dependencies that
are required for this change.
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Rewrite Kubelet-CSR-Approver to use Truecharts written code.

⚒️ Fixes  # <!--(issue)-->

**⚙️ Type of change**

- [ ] ⚙️ Feature/App addition
- [ ] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [X] 🔃 Refactor of current code

**🧪 How Has This Been Tested?**
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Please describe the tests that you ran to verify your changes. Provide
instructions so we can reproduce. Please also list any relevant details
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Tested on CI on own branch up to a successfull install and functionality
beyond that has not been tested. In addition, selection logic for leader
election and verbosity included in the args for the original chart not
included as I couldn't get this to work.

**📃 Notes:**
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**✔️ Checklist:**

- [X] ⚖️ My code follows the style guidelines of this project
- [X] 👀 I have performed a self-review of my own code
- [X] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [ ] ⚠️ My changes generate no new warnings
- [ ] 🧪 I have added tests to this description that prove my fix is
effective or that my feature works
- [X] ⬆️ I increased versions for any altered app according to semantic
versioning
- [X] I made sure the title starts with `feat(chart-name):`,
`fix(chart-name):` or `chore(chart-name):`

**➕ App addition**

If this PR is an app addition please make sure you have done the
following.

- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

---

_Please don't blindly check all the boxes. Read them and only check
those that apply.
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---------

Signed-off-by: Kjeld Schouten <info@kjeldschouten.nl>
Co-authored-by: Kjeld Schouten <info@kjeldschouten.nl>

charts/system/kubelet-csr-approver/Chart.yaml

@@ -15,13 +15,6 @@ dependencies:
     alias: ""
     tags: []
     import-values: []
-  - name: kubelet-csr-approver
-    version: 1.2.2
-    repository: https://postfinance.github.io/kubelet-csr-approver
-    condition: ""
-    alias: kubelet-csr-approver
-    tags: []
-    import-values: []
 deprecated: false
 description: Automatically approve internal Kubelet Certificate Signing Requests
 home: https://truecharts.org/charts/system/kubelet-csr-approver
@@ -38,7 +31,5 @@ name: kubelet-csr-approver
 sources:
   - https://github.com/kubelet-csr-approver/kubelet-csr-approver
   - https://github.com/truecharts/charts/tree/master/charts/system/kubelet-csr-approver
-  - https://github.com/truecharts/containers/tree/master/apps/alpine
-  - https://kubelet-csr-approver.universe.tf
 type: application
-version: 0.0.1
+version: 1.0.0

charts/system/kubelet-csr-approver/templates/common.yaml

@@ -1,5 +1,6 @@
 {{/* Make sure all variables are set properly */}}
 {{- include "tc.v1.common.loader.init" . }}
 
+
 {{/* Render the templates */}}
 {{ include "tc.v1.common.loader.apply" . }}

charts/system/kubelet-csr-approver/values.yaml

@@ -1,18 +1,99 @@
 image:
-  repository: tccr.io/tccr/alpine
+  repository: ghcr.io/postfinance/kubelet-csr-approver
   pullPolicy: IfNotPresent
-  tag: latest@sha256:ade0065e19edaa4f6903d464ee70605111a48394536deb94f31b661264704558
+  tag: 1.2.2@sha256:fdccaa3f2e4f59001b99357565bc5995393c53b21074da769fa53620b5138b85
 
 service:
   main:
-    enabled: false
+    enabled: true
     ports:
       main:
-        enabled: false
+        enabled: true
+        port: 8080
 
 workload:
   main:
-    enabled: false
+    enabled: true
+    replicas: 3
+    podSpec:
+      containers:
+        main:
+          args:
+            - -metrics-bind-address
+            - ":8080"
+            - -health-probe-bind-address
+            - ":8081"
+            - -level
+            - "0"
+          probes:
+            liveness:
+              path: "/healthz"
+              enabled: true
+              type: http
+              port: 8081
+            readiness:
+              path: "/healthz"
+              enabled: true
+              type: http
+              port: 8081
+            startup:
+              path: "/healthz"
+              enabled: true
+              type: http
+              port: 8081
+          env:
+            PROVIDER_REGEX:  ".*"
+            BYPASS_DNS_RESOLUTION: true
+            IGNORE_NON_SYSTEM_NODE: false
+            ALLOWED_DNS_NAMES: 1
+            BYPASS_HOSTNAME_CHECK: false
+            LEADER_ELECTION: true
+
+
+
+rbac:
+  main:
+    enabled: true
+    primary: true
+    clusterWide: true
+    rules:
+      - apiGroups: ["coordination.k8s.io"]
+        resources: ["leases"]
+        verbs: ["create", "get", "update"]
+      - apiGroups: [""]
+        resources: ["events"]
+        verbs: ["create"]
+      - apiGroups: ["certificates.k8s.io"]
+        resources: ["certificatesigningrequests"]
+        verbs: ["get", "list", "watch"]
+      - apiGroups: ["certificates.k8s.io"]
+        resources: ["certificatesigningrequests/approval"]
+        verbs: ["update"]
+      - apiGroups: ["certificates.k8s.io"]
+        resourceNames: ["kubernetes.io/kubelet-serving"]
+        resources: ["signers"]
+        verbs: ["approve"]
+
+serviceAccount:
+  main:
+    enabled: true
+    primary: true
+
+metrics:
+  main:
+    enabled: true
+    type: "servicemonitor"
+    endpoints:
+      - port: main
+        path: /metrics
+    prometheusRule:
+      enabled: false
+      labels: {}
+      rules: []
+
+
+podOptions:
+  automountServiceAccountToken: true
 
 portal:
   open: