feat(docs): metallb docs add kubectl cmd to first step (#9879)

**Description**
update metallb guide to include the kubectl delete command in first step
to avoid confusion.

⚒️ Fixes  # <!--(issue)-->

**⚙️ Type of change**

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

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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 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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charts/enterprise/metallb-config/docs/setup-guide.md

@@ -20,7 +20,10 @@ With MetalLB installed, apps will not be reachable using the integrated loadbala
 
 Install `metallb` from `operators` train first. There is no config, so just hit save.
 
-If you previously had `metallb` installed and are attempting to upgrade, follow the steps specified below in [Migrating an existing MetalLB config to operator-based version](#migrating-an-existing-metallb-config-to-operator-version)
+If you encounter an error upon install, run the following command as root from system settings -> shell and attempt the install again:
+```k3s kubectl delete  --grace-period 30 --v=4 -k https://github.com/truecharts/manifests/delete```
+
+If you previously had `metallb` installed and encounter an error, delete the old version, then run the above command before proceeding to install the `metallb` operator.
 
 ## 2. Set Address Pool & L2 Advertisement in MetalLB-Config
 
@@ -87,9 +90,3 @@ Known Issue: On the SCALE Installed Applications page, the **Open** buttons on e
 :::
 
 For details on other configuration options, please reference the [MetaLB documentation](https://metallb.universe.tf/configuration/)
-
-## Migrating an existing MetalLB config to operator version
-
-- remove the old `metallb` chart coming from the `enterprise` train
-- run this in a **root** shell: `k3s kubectl delete  --grace-period 30 --v=4 -k https://github.com/truecharts/manifests/delete`
-- Proceed with Steps 1 & 2 in the setup guide above