Apply various fixes to Kotlin Serialization modules

[geoand]

Fixes: #22712

[quarkus-bot]

This workflow status is outdated as a new workflow run has been triggered.

Failing Jobs - Building 41295c2

Status	Name	Step	Failures	Logs	Raw logs
✖	Initial JDK 11 Build	Build	Failures	Logs	Raw logs

Failures

⚙️ Initial JDK 11 Build #

- Failing: integration-tests/rest-client-reactive-kotlin-serialization 

📦 integration-tests/rest-client-reactive-kotlin-serialization

✖ Failed to execute goal org.jetbrains.kotlin:kotlin-maven-plugin:1.6.10:compile (compile) on project quarkus-integration-test-rest-client-reactive-kotlin-serialization: Compilation failure

[quarkus-bot]

This workflow status is outdated as a new workflow run has been triggered.

Failing Jobs - Building 245a307

Status	Name	Step	Failures	Logs	Raw logs
✔️	JVM Tests - JDK 11
✖	JVM Tests - JDK 17	Build	Failures	Logs	Raw logs

Full information is available in the Build summary check run.

Failures

⚙️ JVM Tests - JDK 17 #

- Failing: integration-tests/rest-client-reactive-kotlin-serialization 

📦 integration-tests/rest-client-reactive-kotlin-serialization

✖ io.quarkus.it.rest.client.BasicTest.callCountries line 28 - More details - Source on GitHub

org.opentest4j.AssertionFailedError: 

expected: "OK"

✖ io.quarkus.it.rest.client.BasicTest.callCountry line 20 - More details - Source on GitHub

org.opentest4j.AssertionFailedError: 

expected: "Sthlm"

[mkouba]

The fix for #22712 looks good.

[geoand]

@mkouba mind reviewing please? The other fixes are totally trivial, but very necessary to make the extensions work properly

[mkouba]

Looks good.

[mkouba]

Shall we squash the commits?

[gsmet]

I think it makes sense to keep them given they are all semantic and tell a story.

[geoand]

I think it makes sense to keep them given they are all semantic and tell a story.

My thoughts exactly :)

[mkouba]

I think it makes sense to keep them given they are all semantic and tell a story.

Hm, that's a nice idea - you can write a short story in a series of commit comments :D

[gsmet]

Kotlin serialization is in main only so not backporting.