Add Vulnerable / Outdated Typo3 Demo Target  #624

To ensure that we can properly test our typo3 scan integration we should create a vulnerable typo3 demo target which can be used for local experimentation and for the integration tests.

The target should include:

• Dockerfile which can be used to build a vulnerable / outdated typo3 container instance (reliably)
• Docker container should be pushed to our docker hub group. (Automated build would be nice, but is not required)
• Helm Chart to deploy the vulnerable typo3 instance to kubernetes

Notes:

• Demo targets are located in the /demo-targets folder: https://github.com/secureCodeBox/secureCodeBox/tree/main/demo-targets
• Should probably be called old-typo3 to fit in with the simmilar old-wordpress demo target.