Create or update the configurations for servers and/or models in Barman. The parameter should be a JSON
string containing an array of documents. Each document must include a scope key, which can be either
server or model, and either a server_name or model_name key, depending on the scope value. Additionally,
the document should include other keys representing Barman configuration options and their desired
values.
NOTE:
The barman config-update command writes configuration options to a file named .barman.auto.conf,
located in the barman_home directory. This configuration file has higher precedence and will override
values from the global Barman configuration file (usually /etc/barman.conf) and from any included
files specified in configuration_files_directory (typically files in /etc/barman.d). Be aware of this
if you decide to manually modify configuration options in those files later.