Allow to search for processes started by a list of users

**Is your feature request related to a problem? Please describe.**

Right now, it's possible to search for tasks assigned for a list of users, using the parameter assigneeIds, which is used to create the select with this

```

and RES.ASSIGNEE_ IN

#{assigneeId}

```

Sample from modules/flowable-task-service/src/main/resources/org/flowable/task/service/db/mapping/entity/Task.xml

But it is not possible to do a similar query, but for process started by a list of users

**Describe the solution you'd like**

It would be nice if the process API had a parameter like startedByIds, and that could be resolved to something like:

```

and RES.START_USER_ID_ IN

#{startedBy}

```
and

```

and ${queryTablePrefix}START_USER_ID_ IN

#{startedById}

```
This should be in modules/flowable-engine/src/main/resources/org/flowable/db/mapping/entity/Execution.xml and modules/flowable-engine/src/main/resources/org/flowable/db/mapping/entity/HistoricProcessInstance.xml