Increase the amount of memory allocated to a process building sqlite database with datasets

[marekhorst]

Originally requested in redmine: https://support.openaire.eu/issues/10216.

Six years after introducing -Xmx10g value in #953 we need to bump this value even further because the most recent run on PROD failed with the following error message:

Current usage: 15.2 GB of 12.5 GB physical memory used; 27.3 GB of 26.2 GB virtual memory used. Killing container.

which means currently defined value is not enough anymore.

We should increase the value by overwriting the dataset_datacite_sqlite_builder_java_opts parameter default in workflow definition.

This value should be explicitly specified in config-default.xml file for all the previously deployed IIS workflows of we want to backport this patch.