Remove code related to "rfsim4g_enb_fembms" testcase from Iperf_Module() -
replaced by Iperf2_Unidir(). Use copyin() for both remote and local
commands - no need to check if running on localhost anymore.
Create directory for log collection on executor node -
used for log collection in pipelines running on localhost.
Copy the iperf3 report to the executor machine for log collection.
The report needs to be copied to two different directories to ensure
proper log collection across all pipelines. Using absolute paths
ensures compatibility with both remote and local commands.