Warn users when using older GraalVM or Mandrel versions

[zakkak]

Although we try to keep backwards compatibility with older GraalVM or
Mandrel versions, these versions should not be considered as fully
supported by the users, as the compatibility might break at any
time (even at a minor level patch).

[zakkak]

cc FYI @galderz @jerboaa @Karm @metacosm @maxandersen @tqvarnst @jponge

[gsmet]

Good call!

[jerboaa]

Good move. I'd be even more aggressive on the minimum version, but that's probably for another day.

[jerboaa]

I think this should be 23.0 (JDK 17-based), by now for quarkus main. 22.2.0 is very old. Failing that, use 22.3.0 at least.

[zakkak]

Why though? By bumping MINIMUM we (mandrel team) will no longer be able to do tests with these versions (mostly to see the evolution through time or to see in which version a regression was introduced) even if there is no major "breakage". So far there is no extra effort required on our side to keep this as is. cc @galderz

[jerboaa]

I don't see this being tested anywhere with Quarkus main, so unless you can show this actually works with 22.2, there is no point in keeping it.

[quarkus-bot]

Status for workflow Quarkus CI

This is the status report for running Quarkus CI on commit c84ac1d.

✅ The latest workflow run for the pull request has completed successfully.

It should be safe to merge provided you have a look at the other checks in the summary.

---

Flaky tests - Develocity

⚙️ JVM Tests - JDK 21

📦 integration-tests/virtual-threads/grpc-virtual-threads

✖ io.quarkus.grpc.example.streaming.VertxVirtualThreadTest.testEmpty - History

• INTERNAL: Half-closed without a request - io.grpc.StatusRuntimeException

io.grpc.StatusRuntimeException: INTERNAL: Half-closed without a request
	at io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:268)
	at io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:249)
	at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:167)
	at io.grpc.testing.integration.TestServiceGrpc$TestServiceBlockingStub.emptyCall(TestServiceGrpc.java:211)
	at io.quarkus.grpc.example.streaming.VirtualThreadTestBase.testEmpty(VirtualThreadTestBase.java:25)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at io.quarkus.test.junit.QuarkusTestExtension.runExtensionMethod(QuarkusTestExtension.java:1018)