Add temporary publication to formally deprecate the legacy archunit-junit package

[schulzjo-tng]

To validate:

• Run the publishToMavenLocal task
• Gradle:
  • On your local machine, create build.gradle with the following contents:

    plugins {
        id 'java'
    }
    
    description = 'Demonstrates resolution of the relocated archunit-junit artifact'
    
    repositories {
        mavenLocal()
        mavenCentral()
    }
    
    dependencies {
        implementation 'com.tngtech.archunit:archunit-junit:0.9.0'
    }
    

  • Create an empty settings.gradle next to it
  • Run gradle dependencies. Note how the dependency is resolved to archunit-junit4:0.9.0
• Maven:
  • On your local machine, create a pom.xml with the following contents:

    <project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
    
      <groupId>com.tngtech.archunit.demo</groupId>
      <artifactId>archunit-junit-relocation-maven-demo</artifactId>
      <version>1.0-SNAPSHOT</version>
    
      <dependencies>
          <dependency>
              <groupId>com.tngtech.archunit</groupId>
              <artifactId>archunit-junit</artifactId>
              <version>0.9.0</version>
          </dependency>
      </dependencies>
    </project>
    

    • Run mvn install. A warning should be shown that archunit-junit was renamed to archunit-junit4
• Compare the local pom.xml in your local Maven store to the one of archunit-junit:0.8.3. The diff should be sensible.

Closes #1663