MDEV-38771 RPM conflicts between MariaDB-common and mysql-common

mysql-common and MariaDB-common don't install the same files.
mysql-common (in MySQL 8.0) installs character set files
(/usr/share/mysql/charsets/*) and /usr/lib64/mysql (directory only).

MariaDB common installs character set files in /usr/share/mariadb
and the same /usr/lib64/mysql directory along with client plugins
in /usr/lib64/mysql/plugin. The RPM rules of conflict
only will cause troubles on directories if they are installed with
different metatadata (selinux, ownership, permissions) which isn't
the case.

As the character sets are at a different location MariaDB-common
isn't obsoleting mysql-common in a way that provides compatibilty
with mysql-common, for mysql-libs or otherwise, so its just creating
an install conflict.

Users installing perl-DBD-MySQL notice this because its mysql-libs
dependency pulls mysql-common, which conflicts with MariaDB-common.

We correct by removing the conflict and the provides of MariaDB-common
with resepect to mysql-common.

Author: grooverdan

cmake/cpack_rpm.cmake

@@ -230,10 +230,6 @@ SETA(CPACK_RPM_client_PACKAGE_REQUIRES
 
 SETA(CPACK_RPM_common_PACKAGE_CONFLICTS
   "MariaDB-server < 10.6.1")
-SETA(CPACK_RPM_common_PACKAGE_OBSOLETES
-  "mysql-common")
-SETA(CPACK_RPM_common_PACKAGE_PROVIDES
-  "mysql-common")
 
 SETA(CPACK_RPM_devel_PACKAGE_OBSOLETES
   "MySQL-devel")