remove mx.module.* APIs for MXNet 2.0 (#18525)

* remove Module tests

* remove APIs relying on module

* remove docs and tools using mx.module

* remove executor manager

* remove ssd and ncf examples

* add back grad compression api doc

* fix lint

* add back cpredict exmaple

* fix resnet memory test

* remove tests

* remove tests/python/tensorrt/test_tensorrt_lenet5.py since it depends on a model traiend by mx.Module

* skip flaky test

* fix quantization test

* remove subgraph tests

Co-authored-by: EC2 Default User <[email protected]>
Co-authored-by: Lin <[email protected]>