onnxruntime

Decouple strided tensor support from ENABLE_TRAINING (#13829)

### Description
Decouple strided tensor support from ENABLE_TRAINING

### Motivation and Context
This is step 1 for creating a dedicated build for on device training.
Intention is

1. We can set ENABLE_STRIDED_TENSORS in cmake when either
ENABLE_TRAINING or ENABLE_TRAINING_ON_DEVICE is selected, this way we
dont have to use if defined(ENABLE_TRAINING) ||
defined(ENABLE_TRAINING_ON_DEVICE ) everywhere in the code.

2. This also paves the way to easily enable strided tensor support for
inference in future (if required).