openapi-java native applications fail at runtime when REST DSL param arrayType and allowableValues are specified

[jamesnetherton]

Bug description

An issue I stumbled upon while investigating #5528.

If you choose to use the openapi-java extension and have something like the following in the REST definition:

.get("/operation/spec/array/params")
.param()
.name("integer_array")
.dataType("array")
.arrayType("integer")
.allowableValues("1", "2", "3")

Then an exception is thrown in native mode at runtime:

java.lang.IllegalStateException: java.lang.NoSuchMethodException: no such method: java.lang.Integer.valueOf(String)Integer/invokeStatic
        at org.apache.camel.openapi.RestOpenApiReader.convertAndSetItemsEnum(RestOpenApiReader.java:722)
        at org.apache.camel.openapi.RestOpenApiReader.defineSchemas(RestOpenApiReader.java:669)
        at org.apache.camel.openapi.RestOpenApiReader.doParseVerb(RestOpenApiReader.java:505)
        at org.apache.camel.openapi.RestOpenApiReader.doParseVerbs(RestOpenApiReader.java:443)
        at org.apache.camel.openapi.RestOpenApiReader.parse(RestOpenApiReader.java:258)
        at org.apache.camel.openapi.RestOpenApiReader.read(RestOpenApiReader.java:138)

From this logic:

https://github.com/apache/camel/blob/main/components/camel-openapi-java/src/main/java/org/apache/camel/openapi/RestOpenApiReader.java#L504-L518

These types need registering for method reflection:

https://github.com/apache/camel/blob/main/components/camel-openapi-java/src/main/java/org/apache/camel/openapi/RestOpenApiReader.java#L501-L518

The other types don't actually have a valueOf method so they fail even in JVM mode.