chore(templates): hostnet+dnsconfig behind expert (#8635)

**Description**
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⚒️ Fixes  #8633

**⚙️ 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

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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
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [x] ⚠️ 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 opened a PR on
[truecharts/containers](https://github.com/truecharts/containers) adding
the container to TrueCharts mirror repo.
- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

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templates/questions/general/podOptions.yaml

@@ -5,57 +5,64 @@
       additional_attrs: true
       type: dict
       attrs:
-        - variable: hostNetwork
+        - variable: expertPodOpts
-          label: "Host Networking"
+          label: "Expert - Pod Options"
           schema:
             type: boolean
             default: false
-        - variable: dnsConfig
+            show_subquestions_if: true
-          label: "DNS Configuration"
+            subquestions:
-          schema:
+              - variable: hostNetwork
-            type: dict
+                label: "Host Networking"
-            additional_attrs: true
-            attrs:
-              - variable: options
-                label: "Options"
                 schema:
-                  type: list
+                  type: boolean
-                  default: [{"name": "ndots", "value": "2"}]
+                  default: false
-                  items:
+              - variable: dnsConfig
-                    - variable: optionsEntry
+                label: "DNS Configuration"
-                      label: "Option Entry"
+                schema:
+                  type: dict
+                  additional_attrs: true
+                  attrs:
+                    - variable: options
+                      label: "Options"
                       schema:
-                        type: dict
+                        type: list
-                        additional_attrs: true
+                        default: [{"name": "ndots", "value": "2"}]
-                        attrs:
+                        items:
-                          - variable: name
+                          - variable: optionsEntry
-                            label: "Name"
+                            label: "Option Entry"
+                            schema:
+                              type: dict
+                              additional_attrs: true
+                              attrs:
+                                - variable: name
+                                  label: "Name"
+                                  schema:
+                                    type: string
+                                    required: true
+                                - variable: value
+                                  label: "Value"
+                                  schema:
+                                    type: string
+                    - variable: nameservers
+                      label: "Nameservers"
+                      schema:
+                        type: list
+                        default: []
+                        items:
+                          - variable: nsEntry
+                            label: "Nameserver Entry"
                             schema:
                               type: string
                               required: true
-                          - variable: value
+                    - variable: searches
-                            label: "Value"
+                      label: "Searches"
+                      schema:
+                        type: list
+                        default: []
+                        items:
+                          - variable: searchEntry
+                            label: "Search Entry"
                             schema:
                               type: string
-              - variable: nameservers
+                              required: true
-                label: "Nameservers"
-                schema:
-                  type: list
-                  default: []
-                  items:
-                    - variable: nsEntry
-                      label: "Nameserver Entry"
-                      schema:
-                        type: string
-                        required: true
-              - variable: searches
-                label: "Searches"
-                schema:
-                  type: list
-                  default: []
-                  items:
-                    - variable: searchEntry
-                      label: "Search Entry"
-                      schema:
-                        type: string
-                        required: true