Duplicate logging from all processes in distributed run.

[sriharshakandala]

There are duplicate printouts of some logging statements during distributed runs.
E.g.: https://buildkite.com/clima/climaatmos-dot-jl-cpu-scaling/builds/47#0194c851-8a69-485e-807f-50b817598dc2
Here, for example, all processes print the configuration file name. This is particularly noticeable for large distributed runs.
It is sufficient if this information is printed out from one process (for example, the root process).

[sriharshakandala]

cc: @nefrathenrici

[nefrathenrici]

These are duplicated because the logger is only activated in ClimaComms.init, since it requires MPI_comm_rank to silence non-root processes. Any log statements before will be printing by all MPI procs.