BaseTools: Convert Split tool to python

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3165

There are 2 reasons to convert Split tool from C to Python.
1. We are in the process of moving the Basetools Python code
to a separate repository. But there still are many C tools under
edk2/BaseTools. To make all Basetools be in the separate repo,
we can convert the C tools to Python tools.
2. The original Split tool is very slow. This python tool can reduce
90% time.

Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Yuwei Chen <yuwei.chen@intel.com>

Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Reviewed-by: Yuwei Chen <yuwei.chen@intel.com>

BaseTools/Source/C/GNUmakefile

@@ -57,7 +57,6 @@ APPLICATIONS = \
   GenSec \
   GenCrc32 \
   LzmaCompress \
-  Split \
   TianoCompress \
   VolInfo \
   DevicePath