feat(common): write a different check for crd/operator presence (#714)

**Description**
We want to get rid of VerifyOperator code, in favor of code that can
work both with our helm charts and helm charts from other sources.
This does not replace verify-operator **yet** but at least implements a
new way of checking for crd presence, which is the main goal of
verifyOperator

**⚙️ Type of change**

- [x] ⚙️ 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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.github/ct-install-config/ct-lint.yaml

@@ -1,6 +1,6 @@
 remote: origin
 target-branch: master
-helm-extra-args: --debug
+helm-extra-args: --debug --set crd.verify.enabled=false
 chart-yaml-schema: .github/ct-install-config/chart_schema.yaml
 chart-dirs:
   - library

.github/workflows/common_library_tests.yaml

@@ -92,7 +92,7 @@ jobs:
           # Run tests
           cd library/common-test/
           helm dependency update
-          helm unittest -f "tests/**/*.yaml" .
+          helm unittest -f "tests/**/*.yaml" . -v ./unit-values.yaml
 
   install:
     needs: