Resolve some issues and update with main branch

Resolve following issues:

• https://gitlab.mpi-sws.org/cld/tracing/hindsight-grpc/-/issues/1: Generate all TraceIDs in the client
• https://gitlab.mpi-sws.org/cld/tracing/hindsight-grpc/-/issues/12: Propagate data within gRPC calls instead of metadata, which improves trace complete rate of tail-based sampling
• https://gitlab.mpi-sws.org/cld/tracing/hindsight-grpc/-/issues/13: Manage different trace_id and span_id implementations for hindsight and opentelemetry respectively
• https://gitlab.mpi-sws.org/cld/tracing/hindsight-grpc/-/issues/15: Docker images
• https://gitlab.mpi-sws.org/cld/tracing/hindsight-grpc/-/issues/22: Minor change for opentelemetry collector configuration
• https://gitlab.mpi-sws.org/cld/tracing/hindsight-grpc/-/issues/23: Fire triggers based on the calling stacks