[misc] improve goreleaser with RC handling and update docker builds (#6438)

- introduce variables to avoid publishing latest docker tags and installers
- Refactor .goreleaser.yaml to simplify docker configurations and add environment-driven flags
- removed management debug containers (it was doing only log var)
- Stopped building arm v6 32bits in favor of v7 32 bits for services (not client)
- Add target argument to docker files

combined/Dockerfile

@@ -2,4 +2,5 @@ FROM ubuntu:24.04
 RUN apt update && apt install -y ca-certificates && rm -fr /var/cache/apt
 ENTRYPOINT [ "/go/bin/netbird-server" ]
 CMD ["--config", "/etc/netbird/config.yaml"]
-COPY netbird-server /go/bin/netbird-server
+ARG TARGETPLATFORM
+COPY ${TARGETPLATFORM}/netbird-server /go/bin/netbird-server