Run maven-source-plugin attach-sources with jar-no-fork

[ZzAve]

As a follow up of #95 , here we apply the changes correctly to master (missed it due to PR / rebase hell).

Preferred default by: https://maven.apache.org/plugins/maven-source-plugin/usage.html#installing-the-sources-along-with-your-artifact and prevents reruns of your generate sources phase such as graphql-simple-bindings, openapi generator and wirespec

Before:

❯ mvn  package  -DskipTests | egrep --line-buffered  ".*graphql.*---$"
mvnp='mvn package'
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-core ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-core ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-user ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-user ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-iso-country ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-iso-country ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-iso-language ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-iso-language ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-member ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-member ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-workspace ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-workspace ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-multi_tenant ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-multi_tenant ---

after

❯ mvn  package  -DskipTests | egrep --line-buffered  ".*graphql.*---$"
mvnp='mvn package'
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-core ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-user ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-iso-country ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-iso-language ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-member ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-workspace ---
[INFO] --- graphql-simple-bindings:0.8.0:generate (default) @ flock-eco-feature-multi_tenant ---