ECS task metadata logic

### Describe the feature

For performance measurements in the context of Amazon ECS, the metrics data from the task metadata endpoint can be used. Unfortunately, there is no direct AWS SDK support for this, which means that the logic itself has to be implemented.

### Is your Feature Request related to a problem?

It is a common task to get ECS metadata for introspection purposes. On GitHub there are several implementations for this issue, AWS should provide a standardized implementation.

### Proposed Solution

Implement a service to connect with the ECS metadata endpoint and return a Java object/a list of Java objects wrapping the JSON data.

### Describe alternatives you've considered

_No response_

### Acknowledge

- [ ] I may be able to implement this feature request

### AWS Java SDK version used

2.17.121

### JDK version used

Doesn't matter

### Operating System and version

Doesn't matter

Beginne damit, vorhandene AWS Java SDK-Serviceimplementierungen und die in diesem Issue beschriebenen Anforderungen an den ECS task metadata endpoint zu prüfen. Als abgeschlossen gilt die Aufgabe, wenn ein Service eine Verbindung zum Endpoint herstellt und Darstellungen seiner JSON-Daten als Java-Objekt oder Objektliste zurückgibt.

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