Replace power-of-two batch sizes with max compiled model approach

[ahsan-ca]

Description

Replace power-of-two batch sizes with max compiled model approach.

ORT_MIGRAPHX_MAX_COMPILED_MODELS=N, such that

max_compiled_models == 1 -> compile the max batch size.
max_compiled_models == 2 -> compile batch size 1 and max batch size.
max_compiled_models >= 3 -> compile batch sizes of 1, some mid values, max.

max_compiled_models == 0 -> set max_compiled_models to 1.
max_compiled_models > max batch size -> set max_compiled_models to max batch size.

This helps to reduce memory usage for higher batch sizes.

Motivation and Context