Add input parameter for maven artifacts and git source repository to public workflow

[JohT]

🚀 Feature

• Add input parameter for maven artifacts to public workflow: In case of analyzing already published maven artifacts, it is not necessary anymore to download them manually and upload them. Instead, they can simply be specified with comma separated maven "coordinates" using the new input parameter maven-artifacts.

• Add input parameter for source repository cloning: In case of including the git history in an analysis or when a git repository should be downloaded and added to the source folder, it is not necessary anymore to download them manually and upload them. Instead, they can simply be specified using the new input parameters source-repository, source-repository-branch and source-repository-history-only.

⚙️ Optimization

• Run tests in a dedicated workflow: Previously, tests ran within the java report pipeline. Now, test run separately in a dedicated GitHub Actions Workflow.
• Improve grouped report logging: Report initialization is now also grouped and all groups start with a timestamp to get an overview of how much time each report takes.

🛠 Fix

• Verify analysis-name for security: Verify the analysis name input parameter so that it can't contain characters that could lead to security issues in the publicly reusable GitHub actions workflow.