Use upstream conf defaults (Closes: #905599)

See merge request mariadb-team/mariadb-10.3!12

This makes the resulting pipeline view easier to read, and in case
of failures less excess tests are run.

For details see:
https://salsa.debian.org/salsa-ci-team/pipeline/issues/27

This ensures backwards compatiblity with libmysqlclient-dev.

Anything that builds against libmariadb-dev expects to have libgnutls28-dev
also available because libmariadb3 has these compilation flags:

pkg-config --libs libmariadb
-L/usr/lib/x86_64-linux-gnu/ -lmariadb -lz -ldl -lm -lpthread -lgnutls

Fixes regression introduced by changes in commit 6b1f48b3.

Remove from libmariadb-dev and add to many others according to suggestions
by the MultiArch hinter.

It has been disputed whether MySQL and MariaDB can license-wise use
OpenSSL or not. Building with '-DWITH_SSL=bundled' makes the server use
YaSSL and the Connector/C use GnuTLS.

Once OpenSSL 3.0 is released, switch back to it.

Since OpenSSL is missing, libmariadb3 will lack the sha256_password plugin.

Update to upstream version '10.3.13'
with Debian dir 3b0e262fb328aa77d2ba203b13db383b324fedc6

Remove upgrade tests from src:mariadb-10.1 and src:mariadb-connector-c
based binaries since they are no longer available in testing.

Decrease build artifacts expire time to 90 days as it should be enough.

Remove artifacts expires from tests and let them expire according to
what is defined as Gitlab default values.

This reverts commit feee9615.

The symlink /usr/include/mysql/ -> /usr/include/mariadb/ is already
shipped as part of libmariadb-dev-compat(.links).

Fixes the following error:
  dpkg: error processing archive libmariadb-dev-compat_10.3.12-2_amd64.deb
  (--unpack):
    trying to overwrite '/usr/bin/mysql_config', which is also in package
    libmariadbclient-dev 1:10.1.37-3

Complements commit dbb4099a
Needs to be versioned because of 74733c68

for smooth upgrades from libmariadbclient-dev/stretch to
libmariadb-dev/buster

See https://salsa.debian.org/salsa-ci-team/pipeline/tree/master/salsa-ci.yml

mariadb-plugin-tokudb: Properly generate the libjemalloc dependency

See merge request mariadb-team/mariadb-10.3!11

Previous versions of the mentioned failed to build when using the client
library derived from this mariadb-10.3 source package, but have started
working since. The purpose of this Breaks is to smoothen upgrades and
transitions in Debian unstable -> testing.

For pam-mysql see details in Debian#918367 and for libdbd-mysql-perl see
https://github.com/perl5-dbi/DBD-mysql/issues/275 and Debian#917303.

Manual library dependencies are bad, remove and fix the root cause.

Tagging syslog messages with 'mysqld_safe' when in fact the runner was
the postinst script seemed wrong.

Backported from upstream commit
https://github.com/mariadb/server/commit/541500295abdba7fa619065069291ac9c1dd6e83

This decreases the amount of future maintenance work of scripts, and also
makes it easier to compare script contents across versions.

Backported from upstream commit
https://github.com/mariadb/server/commit/541500295abdba7fa619065069291ac9c1dd6e83