wsrep_provider_optons is split into several options now

[byte]

With 8.4.2, we have this

ref: https://jira.mariadb.org/browse/MDEV-22570
been present in mariadb 11: https://mariadb.com/kb/en/mariadb-11-0-0-release-notes/

commit 7bd12106744797f4f4476c586700e482a1ce1820
Author: Daniele Sciascia [email protected]
Date: Tue Dec 20 16:03:23 2022 +0100

MDEV-22570 Implement wsrep_provider_options as plugin

- Provider options are read from the provider during startup, before
  plugins are initialized.
- New wsrep_provider plugin for which sysvars are generated
  dynamically from options read from the provider.
- The plugin is enabled by option plugin-wsrep-provider=ON. If
  enabled, wsrep_provider_options can no longer be used, (an error is
  raised on attempts to do so).
- Each option is either string, integer, double or bool
- Options can be dynamic / readonly
- Options can be deprecated

Limitations:

- We do not check that the value of a provider option falls
within a certain range. This type of validation is still
done in Galera side.