Rose: replace internal_report with program

Replace the use of the internal_report structure (for reports from
engines, MPV etc) with the Rose program interpreter.

SOM processing was reworked to use a new som_operation structure that is
embedded in the appropriate instructions.

src/util/exhaust.h

@@ -34,10 +34,12 @@
 #define EXHAUST_H
 
 #include "rose/rose_internal.h"
-#include "util/internal_report.h"
 #include "util/multibit.h"
 #include "ue2common.h"
 
+/** Index meaning a given exhaustion key is invalid. */
+#define INVALID_EKEY    (~(u32)0)
+
 /** \brief Test whether the given key (\a ekey) is set in the exhaustion vector
  * \a evec. */
 static really_inline