chore(common): hardfail with clear error when required operators are not found. (#505)

**Description**
This PR enabled operator validation failing with an error when operators
are not found.
This means users actually will **need** to migrate to the new way of
handling operators.

**⚙️ Type of change**

- [ ] ⚙️ Feature/App addition
- [ ] 🪛 Bugfix
- [x] ⚠️ 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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**📃 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 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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library/common/Chart.yaml

@@ -15,4 +15,4 @@ maintainers:
 name: common
 sources: null
 type: library
-version: 13.2.2
+version: 14.0.0

library/common/templates/lib/util/_verify_operator.tpl

@@ -40,7 +40,7 @@
       {{- if eq $fetchedOpData "false" -}}
         {{/* Fail only if explicitly asked */}}
         {{- if $.Values.operator.verify.failOnError -}}
-          {{- fail (printf "Operator [%s] have to be installed first" $opName) -}}
+          {{- fail (printf "Operator [%s] has to be installed first" $opName) -}}
         {{- end -}}
       {{/* If $fetchedOpData is not false, we should have JSON data */}}
       {{- else -}}

library/common/values.yaml

@@ -582,8 +582,7 @@ operator:
   verify:
     enabled: true
     # -- Makes non-found operators hard-failing
-    ## TODO: set to true
-    failOnError: false
+    failOnError: true
     # -- a list of extra operators to check for
     additionalOperators: []
   ## -- used as a datastore when a metallb operator is found.