* Add memory pools to Metadata classes.
* Move ShapeToJSON to utils.
* Track returned TensorType from AOTExecutorCodegen.
* Support calling Relay functions with Tuple.
* Expand supported TIR calling conventions to work with C++ runtime.
* Rename MetadataModule to ConstLoaderModule.
* Add runtime AOT executor module.
* Add AOT code-generation.
* Add a runtime Module to mux between .text Metadata and live Metadata.
* Move launch_param to namespace
* Add test of c++ AOT.
* Fix incongruity between kTvmRuntimeCrt constant
* Expand ExecutorCodegenMetadata to include AOT runtime metadata.
* commit cpp test
* Make Metadata compile under C.
* Ignore ephemeral metadata_module export_model_library_format.
* This module does not need to be exported, since it is merely a C++
wrapper around get_c_metadata, and get_metadata is not used in C.
* address manupa, kparszsyc, masahi comments.
* further address comments
* clang and python format
* Fix broken test
* Address lingering comments from masahi, kparszyzc
Andrew Reusch