node-exporter: move hierarchical mounts to top level (#9818)

**Description**
Node exporter fails to start, apparently because it cannot create
additional mountpoints under `/host`. This PR changes the mount points
as follows:
* `procfs` changes from `/host/proc` to `/hostproc`.
* `sysfs` changes from `/host/sys` to `/hostsys`.
⚒️ Fixes  #9817 

**⚙️ 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?**
Removed node-exporter and redeployed it with these changes. Node
exporter starts as expected.

**📃 Notes:**
None.

**✔️ 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`

---

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

Signed-off-by: Todd Radel <todd@radel.us>

charts/dependency/node-exporter/values.yaml

@@ -17,8 +17,8 @@ workload:
       containers:
         main:
           args:
-            - --path.procfs=/host/proc
-            - --path.sysfs=/host/sys
+            - --path.procfs=/hostproc
+            - --path.sysfs=/hostsys
             - --web.listen-address=0.0.0.0:{{ .Values.service.main.ports.main.port }}
             - --collector.filesystem.ignored-mount-points="^/(dev|proc|sys|var/lib/docker/.+|var/lib/kubelet/.+|var/db/system/.+|mnt/[a-zA-Z0-9-_\\.]+/ix-applications/.+)($|/)"
             - --collector.filesystem.ignored-fs-types="^(autofs|binfmt_misc|cgroup|configfs|debugfs|devpts|devtmpfs|fusectl|hugetlbfs|mqueue|overlay|proc|procfs|pstore|rpc_pipefs|securityfs|sysfs|tracefs)$"
@@ -50,12 +50,12 @@ persistence:
   proc:
     enabled: true
     hostPath: /proc
-    mountPath: /host/proc
+    mountPath: /hostproc
     readOnly: true
   sys:
     enabled: true
     hostPath: /sys
-    mountPath: /host/sys
+    mountPath: /hostsys
     readOnly: true
 
 metrics: