Add support for JUnit 6 in azure-sdk-archetype

[Alan Zimmer (alzimmermsft)]

Description

Adds support for JUnit 6 as the testing framework in azure-sdk-archetype. Updates dependency version of JUnit 5 to latest release.

All SDK Contribution checklist:

• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

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🟡 Changes recommended

JUnit 6 dependency metadata is unused and conflicts with the template version, requiring correction before approval.

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Pull request overview

Adds JUnit 6 support to azure-sdk-archetype while preserving JUnit 4 and JUnit 5 generation.

Changes:

• Adds JUnit 6 configuration, dependencies, tests, and documentation.
• Updates JUnit 5 dependency metadata and integration coverage.
• Improves cross-platform post-generation output and changelog coverage.

File summaries

File	Summary
sdk/tools/azure-sdk-archetype/src/test/resources/projects/verify.groovy	Verifies generated dependency versions and test reports.
sdk/tools/azure-sdk-archetype/src/test/resources/projects/junit6/goal.txt	Runs the JUnit 6 generated-project tests.
sdk/tools/azure-sdk-archetype/src/test/resources/projects/junit6/archetype.properties	Defines the JUnit 6 test scenario.
sdk/tools/azure-sdk-archetype/src/test/resources/projects/junit5-default/goal.txt	Runs the default JUnit 5 tests.
sdk/tools/azure-sdk-archetype/src/test/resources/projects/junit5-default/archetype.properties	Defines the default JUnit 5 scenario.
sdk/tools/azure-sdk-archetype/src/test/resources/projects/junit4/goal.txt	Runs the JUnit 4 tests.
sdk/tools/azure-sdk-archetype/src/test/resources/projects/junit4/archetype.properties	Defines the JUnit 4 scenario.
sdk/tools/azure-sdk-archetype/src/main/resources/META-INF/maven/archetype-metadata.xml	Allows JUnit version 6.
sdk/tools/azure-sdk-archetype/src/main/resources/META-INF/archetype-post-generate.groovy	Improves portable status output.
sdk/tools/azure-sdk-archetype/src/main/resources/archetype-resources/src/test/java/AppTest.java	Generates Jupiter-compatible tests for JUnit 5 and 6.
sdk/tools/azure-sdk-archetype/src/main/resources/archetype-resources/pom.xml	Adds JUnit 6 and Surefire configuration; the JUnit 6 version conflicts with tracked metadata (moderate, 1 vote).
sdk/tools/azure-sdk-archetype/README.md	Documents JUnit 6 usage and testing.
sdk/tools/azure-sdk-archetype/pom.xml	Configures archetype integration tests.
sdk/tools/azure-sdk-archetype/CHANGELOG.md	Records the new support and fixes.
eng/versioning/external_dependencies.txt	Registers JUnit 6 metadata, but the alias is unused and its version conflicts with the template (critical, 2 votes).

Review details

Suppressed comments (1)

sdk/tools/azure-sdk-archetype/src/main/resources/archetype-resources/pom.xml:25

• The JUnit 6 version is inconsistent with the dependency registered for this archetype: eng/versioning/external_dependencies.txt adds archetype_org.junit.jupiter:junit-jupiter;6.0.3, but this template resolves 6.1.3. Generated projects therefore use an untracked/different version, and the repository versioning checks cannot update it. Use the tracked version and attach the matching external-dependency marker to this property.

        <junit6.version>6.1.3</junit6.version>

• Files reviewed: 15/15 changed files
• Comments generated: 1
• Review effort level: Lite

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