Consolidation with CDI-PIO (develop)

Generally, this is !11 (merged) rebased onto the develop branch.

This is the first develop-based version accepted by the Buildbot of ICON: https://buildbot.dkrz.de/grid?branch=m300488/cdi-pio-2-integration

src/cdi.h

@@ -432,6 +432,7 @@ void    streamReadVarSlice(int streamID, int varID, int levelID, double data[],
 void    streamReadVarSliceF(int streamID, int varID, int levelID, float data[], SizeType *nmiss);
 
 void    streamWriteVarChunk(int streamID, int varID, const int rect[3][2], const double data[], SizeType nmiss);
+void    streamWriteVarChunkF(int streamID, int varID, const int rect[3][2], const float data[], SizeType nmiss);
 
 
 // STREAM record I/O routines (sequential access)