Test key elements of compat of the devtools code with the local platform catalog

[ia3andy]

• test against the local registry (main)
• Real registry test is @Disabled, we need to test against a snapshot of the real registry (TODO @aloubyansky)

Next step is to also start this test overriding the quarkus-devtools-common version in the eco-system CI to also test the catalog using previous versions of the devtools.

[quarkus-bot]

This workflow status is outdated as a new workflow run has been triggered.

Failing Jobs - Building 63d3557

Status	Name	Step	Failures	Logs	Raw logs
✖	Devtools Tests - JDK 11	Build	Failures	Logs	Raw logs
✖	Devtools Tests - JDK 11 Windows	Build	Failures	Logs	Raw logs
⌛	MicroProfile TCKs Tests	Verify	⚠️ Check →	Logs	Raw logs

Full information is available in the Build summary check run.

Failures

⚙️ Devtools Tests - JDK 11 #

- Failing: integration-tests/devtools 

📦 integration-tests/devtools

✖ io.quarkus.platform.catalog.CatalogCompatibilityTest.testRegistryPlatformCatalog line 37 - More details - Source on GitHub

java.lang.AssertionError: 

Expecting actual not to be null

---

⚙️ Devtools Tests - JDK 11 Windows #

- Failing: integration-tests/devtools 

📦 integration-tests/devtools

✖ io.quarkus.platform.catalog.CatalogCompatibilityTest.testRegistryPlatformCatalog line 29 - More details - Source on GitHub

java.lang.IllegalStateException: Failed to locate the dev tools config file (.quarkus/config.yaml)
	at io.quarkus.devtools.testing.registry.client.TestRegistryClient.<init>(TestRegistryClient.java:38)
	at io.quarkus.devtools.testing.registry.client.TestRegistryClientFactory.buildRegistryClient(TestRegistryClientFactory.java:32)

[ebullient]

We should think about writing this in the ecosystem build using karate (as @maxandersen does for jbang) so that it is testing across projects from the outside.
I would especially love it if this could avoid using the devtools-testing project, as I would love to have something that verifies the behavior we want across versions that isn't subject to change due to refactoring of internals.