AthenaConfiguration+AthenaPoolCnvSvc+OutputStreamAthenaPool: Add a new flag to mark streams temporary when applicable

This MR introduces a new CA flag, Output.TemporaryStreams, which holds a list of stream names that are marked by the user as temporary. If a stream is temporary, two things happen:

• We overwrite the compression settings to 101 (I kept ZLIB for forward/backward compatibility)
• We do NOT extend the provenance record

Tagging @gemmeren, @mnowak, and @maszyman explicitly for feedback.

Control/AthenaConfiguration/python/AllConfigFlags.py

@@ -256,6 +256,7 @@ def initConfigFlags():
     acf.addFlag('Output.doJiveXML', False, help='write JiveXML file')
 
     acf.addFlag('Output.TreeAutoFlush', {}, help="dict with auto-flush settings for stream e.g. {'STREAM': 123}")
+    acf.addFlag('Output.TemporaryStreams', [], help='list of output streams that are marked temporary')
     acf.addFlag('Output.StorageTechnology.EventData', 'ROOTTREEINDEX', help='set the underlying POOL storage technology for event data')
     acf.addFlag('Output.StorageTechnology.MetaData', 'ROOTTREE', help='set the underlying POOL storage technology for metadata')