Deployment class path not built for custom source sets in Gradle

[AmsterdamFilho]

Describe the bug

When a new source set is created, for example, for integration tests, quarkus is not building the class path correctly.

Quarkus only builds the class path for implementation and testImplementation configurations.

Originally posted here https://stackoverflow.com/questions/70700501/serviceconfigurationerror-when-running-a-quarkustest-using-gradle-kts

[quarkus-bot]

/cc @glefloch, @quarkusio/devtools

[cjbooms]

This bug causes a huge amount of pain for the engineers I work with at Zalando. We make heavy use of integration tests in our multi-module Quarkus applications, and the DI fails because of this often with the very cryptic error message:

io.smallrye.config.SmallRyeConfigFactory: io.quarkus.runtime.configuration.QuarkusConfigFactory not a subtype

This results in engineers changing things from ApplicationScoped to Singleton, moving factories around, and engaging in all sorts of other toil to fix the issue. When the issue presents, it is incredibly time-consuming to diagnose and fix, and the workarounds leaves the code base in a worse state than before.