MDEV-30953: Add package for Galera server

[illuusio]

• The Jira issue number for this PR is: MDEV-30953

Description

Add new package mariadb-server-galera to Debian to recude mariadb-server package dependencies. Galera cluster scripts and libraries are currently in package mariadb-server. Move Galera cluster scripts and libraries to new package mariadb-server-galera as most of the people does not need them and it allows to slim down mariadb-server package

How can this PR be tested?

As Salsa-CI is currently running out of space most of time (this should be addressed) this could check out:
branch: https://salsa.debian.org/illuusio/mariadb-server/-/pipelines/575821
11.3: https://salsa.debian.org/illuusio/mariadb-server/-/pipelines/575819
or build by hand in Debian sid with debian/autobake-deb.sh

This should also go thru MariaDB BB builds

Basing the PR against the correct MariaDB version

• [x ] This is a new feature and the PR is based against the latest MariaDB development branch.

PR quality check

• I checked the CODING_STANDARDS.md file and my PR conforms to this where appropriate.
• For any trivial modifications to the PR, I am ok with the reviewer making the changes themselves.

[grooverdan]

move and enable debian/additions/mariadb.conf.d/60-galera.cnf with "ON" settings.

[galera]
# Mandatory settings
wsrep_on                 = ON
wsrep_provider      = /usr/lib/galera/libgalera_smm.so
binlog_format            = row
innodb_autoinc_lock_mode = 2

#wsrep_cluster_name       = "MariaDB Galera Cluster"
#wsrep_cluster_address    = gcomm:https://
#default_storage_engine   = InnoDB

Uncommentted ones changed because they aren't the default. Need to test more if wsrep_cluster_address can be unset/blank.

Is RPM changes from #1829 moving here? Including change the CMakeLists.txt COMPONENT for every part here so that RPM is as close as possible.

TODO check is wsrep_provider path on MariaDB.org deb package is in the same path as debian, and ubuntu.

Also pv is an optional package used by SST.

[illuusio]

Ok no it's working as expected. Galera is turned OFF when it's not installed. What should be done is to ask user or just enable things if Galera package is installed.

[CLAassistant]

All committers have signed the CLA.