[ci] containerize integration tests jobs

[florianl]

To further speed up CI, maybe create a separate docker image for integration tests (with qemu and other tools preinstalled).

Follow up to https://github.com/open-telemetry/opentelemetry-ebpf-profiler/pull/914#issuecomment-3479138930

[kushalShukla-web]

liked to solve this issue !

[florianl]

Using Docker (to retrieve the Kernel images) inside of Docker, as in https://github.com/open-telemetry/opentelemetry-ebpf-profiler/pull/985, revealed some challenges. Therefore closing this issue.