List<PathSegment> exception on RESTEasy Reactive

[snowdrop-bot]

Describe the bug

As I asked in Zulip, I wanted to use List<PathSegment> with RESTEasy Reactive extension to use @PathParam and Regular Expressions. i.e. @path("{keyword:.*}")
https://docs.jboss.org/resteasy/docs/4.6.0.Final/userguide/html_single/index.html#_PathParam_and_PathSegment

But I'm getting exceptions as below:
https://github.com/tedwon/quarkus-resteasy-reactive-with-pathsegment/blob/master/README.adoc

It is working properly with @PathParam("id") PathSegment id:
https://github.com/tedwon/quarkus-resteasy-reactive-with-pathsegment/blob/master/src/main/java/org/acme/getting/started/ReactiveGreetingResource.java#L51-L55

However, getting errors java.lang.RuntimeException: Failed to find converter for javax.ws.rs.core.PathSegment with @PathParam("keyword") List<PathSegment> keywords while startup Quarkus.
https://github.com/tedwon/quarkus-resteasy-reactive-with-pathsegment/blob/master/src/main/java/org/acme/getting/started/ReactiveGreetingResource.java#L57-L61

Note that it is working properly for the same code with List on my other Quarkus app with quarkus-resteasy extension.

Expected behavior

No exception for the usage of List with quarkus-resteasy extension

Actual behavior

2021-05-02 02:16:02,416 ERROR [io.qua.dep.dev.IsolatedDevModeMain] (main) Failed to start quarkus: java.lang.RuntimeException: io.quarkus.builder.BuildException: Build failure: Build failed due to errors
	[error]: Build step io.quarkus.resteasy.reactive.server.deployment.ResteasyReactiveProcessor#setupEndpoints threw an exception: java.lang.RuntimeException: java.lang.RuntimeException: Failed to process method org.acme.getting.started.ReactiveGreetingResource#java.lang.String searchByKeywords(java.util.List<javax.ws.rs.core.PathSegment> keywords)
	at org.jboss.resteasy.reactive.common.processor.EndpointIndexer.createEndpoints(EndpointIndexer.java:238)
	at io.quarkus.resteasy.reactive.server.deployment.ResteasyReactiveProcessor.setupEndpoints(ResteasyReactiveProcessor.java:402)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at io.quarkus.deployment.ExtensionLoader$2.execute(ExtensionLoader.java:920)
	at io.quarkus.builder.BuildContext.run(BuildContext.java:277)
	at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2415)
	at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1452)
	at java.base/java.lang.Thread.run(Thread.java:834)
	at org.jboss.threads.JBossThread.run(JBossThread.java:501)
Caused by: java.lang.RuntimeException: Failed to process method org.acme.getting.started.ReactiveGreetingResource#java.lang.String searchByKeywords(java.util.List<javax.ws.rs.core.PathSegment> keywords)
	at org.jboss.resteasy.reactive.common.processor.EndpointIndexer.createResourceMethod(EndpointIndexer.java:524)
	at org.jboss.resteasy.reactive.common.processor.EndpointIndexer.createEndpoints(EndpointIndexer.java:285)
	at org.jboss.resteasy.reactive.common.processor.EndpointIndexer.createEndpoints(EndpointIndexer.java:209)
	... 11 more
Caused by: java.lang.RuntimeException: Failed to find converter for javax.ws.rs.core.PathSegment
	at io.quarkus.resteasy.reactive.server.deployment.QuarkusServerEndpointIndexer.extractConverter(QuarkusServerEndpointIndexer.java:198)
	at org.jboss.resteasy.reactive.server.processor.ServerEndpointIndexer.handleListParam(ServerEndpointIndexer.java:277)
	at org.jboss.resteasy.reactive.server.processor.ServerEndpointIndexer.handleListParam(ServerEndpointIndexer.java:57)
	at org.jboss.resteasy.reactive.common.processor.EndpointIndexer.extractParameterInfo(EndpointIndexer.java:909)
	at org.jboss.resteasy.reactive.common.processor.EndpointIndexer.createResourceMethod(EndpointIndexer.java:407)
	... 13 more

To Reproduce

Please run this reproducer project:
https://github.com/tedwon/quarkus-resteasy-reactive-with-pathsegment

./mvnw quarkus:dev

Quarkus version or git rev

QUARKUS 1.13.3

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quarkusio#17034

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$upstream:17034$