mariadb : remove obsolete mariadb variants from the tree

[BjarneDMat]

removed obsolete mariadb variants
marked  obsolete mariadb variants as requiring next up LTS variant
added   variant  mariadb11.4

port echo \
       'depends::mariadb(-10\.([34789]|10))?(\s|$)' \
    or 'variant:mariadb(_?(5([._]?[0-9.]*)?|10[._]?([34789]|10)))?(\s|$)'

ToDo :
akonadi                         apr-util                        dbslayer                        
freeradius                      hydra                           neko                            
pficommon                       pure-ftpd                       py-oursql                     
qore-mysql-module               root5                           root6                           
sphinx                          trojan                          

Fixed :
dovecot                         postfix                         php-mysql                     
py-mysqlclient                  p5-dbd-mariadb                  p5-dbd-mysql                 
qt5-mysql-plugin                qt53-mysql-plugin               qt55-mysql-plugin               
qt56-mysql-plugin               qt57-mysql-plugin               qt58-mysql-plugin               
qt59-mysql-plugin               qt511-mysql-plugin              qt513-mysql-plugin              
qt6-mysql-plugin                qt64-mysql-plugin               qt67-mysql-plugin               

WontFix - Abandoned :
amarok                          libzdb-mariadb                  mariadb-connector-cpp           
mariadb-lib_mysqludf_fPROJ4     mariadb-lib_mysqludf_json       
mariadb-lib_mysqludf_preg       mariadb-lib_mysqludf_xql        
qt4-mac-mariadb-plugin          

WontFix - Obsolete:
py27-mysql                      

[macportsbot]

Notifying maintainers: @michaelld for port mariadb-10.10, mariadb-10.3, mariadb-10.4, mariadb-10.7, mariadb-10.8, mariadb-10.9, mariadb. @ryandesign for port php. @jdberry for port dovecot. @jmroot for port postfix. @ctreleaven for port py-mysqlclient.

[BjarneDMat]

@jmroot I've started the process ... I'll amend w/ the other ports the comming days as I get time; but I wanted to get started now in order to get feedback from the maintainers.