[AGIPD] [Correct] error out only if all sources are empty

Description

This MR is related to https://redmine.xfel.eu/issues/150179#change-549590

The fix is to avoid erroring out the notebook when some and not all sources are empty in the run.

How Has This Been Tested?

This has been tested with the runs mentioned in the ticket.

Relevant Documents (optional)

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

Reviewers

@hammerd

notebooks/AGIPD/AGIPD_Retrieve_Constants_Precorrection.ipynb

 ``` python
 run_dc = RunDirectory(in_folder / f"r{run:04d}")
-
 instrument_src = instrument_source_template.format(karabo_id, receiver_template)
 
-instr_dc = run_dc.select(instrument_src.format("*"), require_all=True)
+instr_dc = run_dc.select(instrument_src.format("*"))
+
+for m in modules:
+    # Remove empty sources from `instr_dc`
+    if instr_dc[instrument_src.format(m), 'image.data'].shape[0] == 0:
+        instr_dc = instr_dc.deselect(instrument_src.format(m))
 
-if not instr_dc.train_ids:
+if not instr_dc.all_sources:
     raise ValueError(f"No images found for {in_folder / f'r{run:04d}'}")