OMERO.matlab: add delete functions (see #10386) (rebased onto develop)



This is the same as gh-952 but rebased onto develop.

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This PR adds a series of function to delete core objects from the server
```
deleteProjects(session, projectIds);
deleteDataset(session, datasetIds);
deleteImages(session, imageIds);
deleteScreens(session, screenIds);
deletePlates(session, plateIds);
```