[Build]Integrate compile to cmake as only, remove makefile

[NeoZhangJianyu]

Description

MXNet provide CMakelist.txt and Makefile in same time to compile.
It's hard to maintain two compile systems, please integrate to cmake as only.

cmake support build MXNet in all OS (windows, linux, mac) , makefile is only support non-windows.

We meet trouble that makefile is updated for new code, but CMakelist.txt is missed to update for the new code.
So the cmake is broken in linux and windows. And the CI doesn't find such error.
Refer to #14492

Environment info (Required)

Linux and Windows.

Package used (Python/R/Scala/Julia):
NA

Build info (Required if built from source)

Compiler (gcc/clang/mingw/visual studio):
All.

MXNet commit hash:
git rev-parse HEAD
1c49e40

Build config:
NA

Error Message:

NA

Minimum reproducible example

NA

Steps to reproduce

NA

What have you tried to solve it?

Remove Makefile in MXNet project.
User only use cmake to build the MXNet.

[mxnet-label-bot]

Hey, this is the MXNet Label Bot.
Thank you for submitting the issue! I will try and suggest some labels so that the appropriate MXNet community members can help resolve it.
Here are my recommended labels: Build

[pengzhao-intel]

@larroy @szha @eric-haibin-lin

[KellenSunderland]

I'd propose we have two votes on dropping Makefile. One vote for dropping support in the next major version (2.0), one vote for dropping support in an upcoming minor version (either 1.5 or 1.6).

[larroy]

@KellenSunderland happy to ditch Make, unfortunately Jetson doesn't build with CMake due to CUDA and cross compilation complications. We are using your work to (cross)compile for Jetson.