MDEV-30576 Add a script to output spider errors

usage example (from the build dir):

./storage/spider/pspderr 12701

storage/spider/CMakeLists.txt

@@ -31,6 +31,19 @@ ELSE()
   IF(NOT TARGET spider)
     RETURN()
   ENDIF()
+
+  CONFIGURE_FILE(spd_err.h . COPYONLY)
+  CONFIGURE_FILE(pspderr . COPYONLY)
+  INSTALL(FILES
+    "spd_err.h"
+    DESTINATION ${INSTALL_PLUGINDIR}
+    COMPONENT Server
+  )
+  INSTALL_SCRIPT(
+    "pspderr"
+    DESTINATION ${INSTALL_PLUGINDIR}
+    COMPONENT Server
+  )
 ENDIF()
 
 IF(MSVC AND (TARGET spider))

storage/spider/pspderr

+#!/bin/bash
+
+er=$(grep "$1" $(dirname "$0")/spd_err.h | grep -oE [A-Z_]+_NUM | sed 's/_NUM//')
+grep -E "#define[[:space:]]+$er(_NUM|_STR)" $(dirname "$0")/spd_err.h