New errors with gRPC version

[plasorak]

I've seen a lot of these message when booting the system on the most recent nightly

WARNING: All log messages before absl::InitializeLog() is called are written to STDERR
I0000 00:00:1738689606.674138 1143623 fork_posix.cc:75] Other threads are currently calling into gRPC, skipping fork() handlers

Need to investigate where it comes from.

[plasorak]

Described in greater details here: https://github.com/DUNE-DAQ/daq-release/wiki/Externals-Survey#nfdt_dev_241129_a9

[PawelPlesniak]

Last time this happened it was because of a grpc version update in the requirements, we had gone from 1.63.0 to 1.65.4. Yesterday's nightly shows 1.68.0

[plasorak]

It seems that doing:

GRPC_ENABLE_FORK_SUPPORT=false drunc-unified-shell...

Fixes the problem. Still need to understand what exactly happens.