* unify vm and interpreter objects

* move closure back vm

* adt/closure back to vm.adt/vm.closure

* closure base

* replace TensorObj and TensorValue with NDArray

* NodeBase to Object in Python

* rebase

* [AutoTVM] Use vm compile in extracting task from relay

* update

* restructure vm compiler to reduce task extraction time

* x

* fix

* update doc

* udpate doc

* lint

* [relay] test tensor_array in vm

* add tensor_array scatter test

* [VM] add a few more API to vm

* [VM][Fix] fix vm convert args

* [VM] a few fixes

* rename fields

* update

* update vm profiler

* x

* add doc

* lint

* fix test

* address comments

Previously runtime::Module was supported using shared_ptr.
This PR refactors the codebase to use the Object protocol.

It will open doors to allow easier interpolation between
Object containers and module in the future.

We think it will reduce the confusion with the meaning.

https://discuss.tvm.ai/t/discuss-consider-rename-vm-datatype/4339

* [relay][vm] Separate VM runtime with executable

* Address comments

* move ctx back to vm

* make only vm related fields and methods protected

* integrate seriliaztion/deserialization to executable

* create stream

* [RUNTIME] Refactor object python FFI to new protocol.

This is a pre-req to bring the Node system under object protocol.
Most of the code reflects the current code in the Node system.

- Use new instead of init so subclass can define their own constructors
- Allow register via name, besides type idnex
- Introduce necessary runtime C API functions
- Refactored Tensor and Datatype to directly use constructor.

* address review comments

* [Relay][VM] Fix constant folding issue in VM compiler

1. allow pass params when compile a module
2. enhance profiler robustness

* remove dead code

* fix lint

* add get_params

* fix test

* don't pass params back

* remove get_params

* docs

* move compile function to api

* compile clashes with builtin name

* fix compilation error

* remove dead code

* fix

* tweak

* init shape func in interpreter and vm compiler

* Update interpreter

* fix

* lint

* lint

* fix

* remove hack

* update

* fix

* fix

* update

* address comments & update for shape_of

* fix lint

* update

* fix hybrid

* lint

* fix bug & add take shape func

* lint

* lint

* update

* fix flaky test

* add todo

* [Relay][VM] Support execution on devices

* Reduce Copy calls

* Cleanup

* Lint

* CR comments

* Merge test into test_vm.py

* relay vm serialization

* fix lint

* load params, fix stream

* lint

* fix typo

* tmp

* Port vm and object to python

* clean up

* update vm build module

* update

* x

* tweak

* cleanup

* update

* fix rebase

* Rename to VMCompiler

* fix

* [relay][frontend] Return Module from get_workload

* pass entry_func to autotvm

* disable tune

* add property to module

* mod.entry_func to main

* .main -> mod["main"]

* fix

* Support export ADT value in Python

* Cache original functions

* Cleanup

* Cleanup

* Implement the virtual machine

Co-Authored-By: wweic <ipondering.weic@gmail.com>

* Fix rebase build issues

* Reorganize vm.py and fix allocator bug

* Remove compiler

* Remove tests

* Remove backend/vm/vm.cc too

* Fix docs

* Fix doc

* Fix doc

* Add vm docs

* Remove change to dead_code.cc

* Remove Relay logging

* Remove reduce

* Update include/tvm/runtime/vm.h

Co-Authored-By: jroesch <roeschinc@gmail.com>

* Reformat

* Update include/tvm/runtime/vm.h

Co-Authored-By: jroesch <roeschinc@gmail.com>

* Address feedback

* Update include/tvm/runtime/vm.h

Co-Authored-By: jroesch <roeschinc@gmail.com>

* Apply suggestions from code review

Co-Authored-By: jroesch <roeschinc@gmail.com>

* Fix a couple outstanding comments

* Last couple comments

* Update include/tvm/runtime/vm.h

Co-Authored-By: jroesch <roeschinc@gmail.com>

* Address code review feedback

* Fix final comment

* Address comments

* Error reporting and example

* add Const

* Explicitly delete copy assignment operator

* Fix rebase

* Pass 3rd arg to fusion