Task operations are slower after a join was introduced in "getTaskInstanceById" query

The getTaskInstanceById query was changed in JBPM-8116. A join with another table, called NodeInstanceLog, is needed now to retrieve slaDueDate and slaCompliance information.
The introduction of the join was accepted in the PR but we should probably at least include this in the release notes that we are aware of it. If it is decided that this decrease is not acceptable, we might try to implement it differently.