Camel-avro-rpc introduction of SPI for the HTTP server

[JiriOndrusek]

Issues: https://issues.apache.org/jira/browse/CAMEL-16740

This PR introduces a new spi api for camel-avro-rpc, which allows to switch implementation of the HTTP server.
It moves current module into new location camel-avro-rpc/camel-avro-rpc and adds 2 new modules: components/camel-avro-rpc/camel-avro-rpc-spi
and components/camel-avro-rpc/camel-avro-rpc-jetty .
High picture:
Component (in AvroListener) uses org.apache.camel.component.avro.spi.AvroRpcHttpServerBuilder as a spi interface (from camel-avro-rpc-spi) for creation of http server.
Module camel-avro-rpc-jetty contains implementation of this interface in the way it was before - using jetty http server. This module is used by compinent by default.
Nothing changes from the user point of view .

[davsclaus]

When creating a middle folder for that component, then I think you need to look in the camel-maven-package-plugin that prepares the catalog (PrepareCatalogMojo), that it needs to deal with this. Try to git grep camel-salesforce etc that is also a middle folder.

[oscerd]

At first sight this requires some work at catalog level. The removal of avro component from catalog seems to be wrong.

[JiriOndrusek]

@oscerd my idea was to move avro-component module to sub-folder without changing any link to catalog. If there is some configuration needed here, I'll add it. May I ask you for the help? Is it the camel-maven-package-plugin mentioned by @davsclaus?

[davsclaus]

Yes its that maven plugin

[oscerd]

There is a switch https://github.com/apache/camel/blob/main/tooling/maven/camel-package-maven-plugin/src/main/java/org/apache/camel/maven/packaging/PrepareCatalogMojo.java#L575

And you need to go down the directory to get the documentation.

[JiriOndrusek]

Thanks a lot. I'll fix it

[JiriOndrusek]

I forgot to fix the doc. I'll do it.

[JiriOndrusek]

@oscerd @davsclaus Catalog problem is fixed.