feat(zigbee2mqtt): Remove old options (#17564)

**Description**

I'm not a heavy user but removing the old API seems sensible (especially
if it wasn't necessary 3 years ago) and changing the defaults to not
true to automatic join is also a good idea

⚒️ Fixes  #17562 and #17561

**⚙️ Type of change**

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

**🧪 How Has This Been Tested?**
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**📃 Notes:**
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**✔️ Checklist:**

- [ ] ⚖️ My code follows the style guidelines of this project
- [ ] 👀 I have performed a self-review of my own code
- [ ] #️⃣ 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
- [ ] ⬆️ I increased versions for any altered app according to semantic
versioning

**➕ 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`

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charts/stable/zigbee2mqtt/Chart.yaml

@@ -35,4 +35,4 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/zigbee2mqtt
   - https://hub.docker.com/r/koenkk/zigbee2mqtt
 type: application
-version: 10.3.7
+version: 10.4.0

charts/stable/zigbee2mqtt/questions.yaml

@@ -42,13 +42,7 @@ questions:
                                               description: "This will override the specific value of config file"
                                               schema:
                                                 type: boolean
-                                                default: true
-                                            - variable: ZIGBEE2MQTT_CONFIG_EXPIRIMENTAL_NEW_API
-                                              label: "ZIGBEE2MQTT_CONFIG_EXPIRIMENTAL_NEW_API"
-                                              description: "This will override the specific value of config file"
-                                              schema:
-                                                type: boolean
-                                                default: true
+                                                default: false
                                             - variable: ZIGBEE2MQTT_CONFIG_MQTT_SERVER
                                               label: "MQTT Server"
                                               description: "This will override the specific value of config file"

charts/stable/zigbee2mqtt/values.yaml

@@ -31,7 +31,6 @@ workload:
           type: init
           env:
             ZIGBEE2MQTT_CONFIG_FRONTEND_PORT: "{{ .Values.service.main.ports.main.port }}"
-            ZIGBEE2MQTT_CONFIG_EXPIRIMENTAL_NEW_API: "{{ .Values.workload.main.podSpec.containers.main.env.ZIGBEE2MQTT_CONFIG_EXPIRIMENTAL_NEW_API }}"
             ZIGBEE2MQTT_CONFIG_PERMIT_JOIN: "{{ .Values.workload.main.podSpec.containers.main.env.ZIGBEE2MQTT_CONFIG_PERMIT_JOIN }}"
             ZIGBEE2MQTT_CONFIG_MQTT_SERVER: "{{ .Values.workload.main.podSpec.containers.main.env.ZIGBEE2MQTT_CONFIG_MQTT_SERVER }}"
             ZIGBEE2MQTT_CONFIG_MQTT_USER: "{{ .Values.secret.ZIGBEE2MQTT_CONFIG_MQTT_USER }}"
@@ -55,8 +54,6 @@ workload:
                 echo "# You however will not see this values change in the file." >> /data/configuration.yaml;
                 echo "# It's a generated file based on the values provided on initial install." >> /data/configuration.yaml;
                 echo "##########################################################" >> /data/configuration.yaml;
-                echo "experimental:" >> /data/configuration.yaml;
-                echo "  new_api: $ZIGBEE2MQTT_CONFIG_EXPIRIMENTAL_NEW_API" >> /data/configuration.yaml;
                 echo "frontend:" >> /data/configuration.yaml;
                 echo "  port: $ZIGBEE2MQTT_CONFIG_FRONTEND_PORT" >> /data/configuration.yaml;
                 echo "permit_join: $ZIGBEE2MQTT_CONFIG_PERMIT_JOIN" >> /data/configuration.yaml;
@@ -86,8 +83,7 @@ workload:
             # User defined
             USE_CUSTOM_CONFIG_FILE: false
             # This values are required for the autogenerated file to work.
-            # ZIGBEE2MQTT_CONFIG_EXPIRIMENTAL_NEW_API: true
-            # ZIGBEE2MQTT_CONFIG_PERMIT_JOIN: true
+            # ZIGBEE2MQTT_CONFIG_PERMIT_JOIN: false
             # ZIGBEE2MQTT_CONFIG_MQTT_SERVER: "mqtt://localhost"
             # ZIGBEE2MQTT_CONFIG_MQTT_BASE_TOPIC: "zigbee2mqtt"
             # ZIGBEE2MQTT_CONFIG_SERIAL_PORT: "/dev/ttyUSB0"