In Resteasy Reactive, fix line separator for "x-ndjson" and "stream+json".

[Sgitario]

We're wrongly using /n instead of \n.
This was done in #20908

[Sgitario]

cc @michalszynkiewicz

[quarkus-bot]

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[geoand]

Ouch... nice catch

[michalszynkiewicz]

Ouch... nice catch

found it when adding support for ndjson in the client

[gsmet]

Well, I think it was high time to invent a brand new new line separator besides \r, \n and \r\n. Are we going to innovate or not?!?

[geoand]

😆

[quarkus-bot]

Failing Jobs - Building a619566

Status	Name	Step	Failures	Logs	Raw logs
✖	MicroProfile TCKs Tests	Verify	Failures	Logs	Raw logs

Full information is available in the Build summary check run.

Failures

⚙️ MicroProfile TCKs Tests #

- Failing: tcks/microprofile-fault-tolerance 

📦 tcks/microprofile-fault-tolerance

✖ org.eclipse.microprofile.fault.tolerance.tck.TimeoutUninterruptableTest.testTimeoutAsyncBulkhead line 190 - More details - Source on GitHub

java.lang.AssertionError: Unexpected exception thrown from Future
	at org.testng.Assert.fail(Assert.java:85)
	at org.eclipse.microprofile.fault.tolerance.tck.util.Exceptions.expect(Exceptions.java:98)