Fix accent sensitivity

Summary

Fixes: "Queries ignore accents and umlauts": Changed to more appropriate collation and character sets. See caosdb-server#341 (closed)

Focus

Is this compatible with all kinds of queries? Is everything changed that needs changing?

Test Environment

See MR caosdb-pyinttest!90 (merged)

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.docker/docker-compose.yml

 version: '3.6'
 services:
   sqldb:
-    image: mariadb:10.5
+    image: mariadb:11.4
     volumes:
       - type: volume
         source: "caosdb-sqldata"