[FEATURE] `set -x` in bash scripts when `LOG_LEVEL=DEBUG`

**Overview of feature request**

Trickle down the slog log level (current set via environment variable `SCYLLARIDAE_LOG_LEVEL`) into the command that is ran for more debug help

**What inspired the request?**

I was debugging a scyllaridae microservice that was failing in a bash script being invoked and having a trace of the bash in the logs would have made this easier 
 
