Create Integration Tests using Tescontainers

[S-Tim]

It would be beneficial to an integration test setup that could utilize Testcontainers. For example the single node MariaDB scenario would benefit from such a setup That way it could use the same migration scripts in the tests as it does in when run normally.

An example for a mariab test profile could look like this:
application-mariadb.yml

spring:
  datasource:
    url: jdbc:h2:mem:public;MODE=MySQL;CASE_INSENSITIVE_IDENTIFIERS=TRUE;INIT=create schema if not exists PUBLIC;DB_CLOSE_DELAY=-1;NON_KEYWORDS=VALUE;DB_CLOSE_ON_EXIT=FALSE
    driver-class-name: org.h2.Driver
  jpa:
    database-platform: org.hibernate.dialect.MariaDB103Dialect

Unfortunately using the MariaDB compatibility mode of H2 is currently not possible with the Camunda initialization scripts because it seems that the syntax for creating indices is not fully supported.