Add FW dump with new SAI implementation (sonic-net#1298)

Mellanox SAI implementation of the sai dump is now extracting more information which previously provided by direct call to a Mellanox FW tool which is not longer required.

The new files created will be taken along with the new dump.
Remove MST dump as it is not required anymore.

scripts/generate_dump

@@ -517,11 +517,12 @@ collect_mellanox() {
     ${CMD_PREFIX}docker exec syncd tar Ccf $(dirname $sai_dump_filename) - $(basename $sai_dump_filename) | tar Cxf /tmp/ -
     save_file $sai_dump_filename sai_sdk_dump true
 
-    local mst_dump_filename="/tmp/mstdump"
-    local max_dump_count="3"
-    for i in $(seq 1 $max_dump_count); do
-        ${CMD_PREFIX}/usr/bin/mstdump /dev/mst/mt*conf0 > "${mst_dump_filename}${i}"
-        save_file "${mst_dump_filename}${i}" mstdump true
+    file_list_string=$(${CMD_PREFIX}docker exec -it syncd ls -l /tmp | grep sdkdump | awk '{print $9}' | tr -d '\r')
+    file_list_array=( $file_list_string )
+    for element in "${file_list_array[@]}"
+    do
+        docker cp syncd:/tmp/$element /tmp
+        save_file /tmp/$element sai_sdk_dump true
     done
 }