Add an example of FastViT model (Infernece)

[cfgfung]

What does this PR do?

Added the example code of the validated FastViT.

Original performance:
n_iterations: 20
Total latency (ms): 451.754093170166
Average latency (ms): 22.5877046585083

BF16 + Graph mode:
n_iterations: 20
Total latency (ms): 47.97697067260742
Average latency (ms): 2.398848533630371

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

[yeonsily]

@cfgfung Is this the same change with #814?

[cfgfung]

@cfgfung Is this the same change with #814?

@yeonsily This is another example. Look similar but not the same. Removed unrelated files. Thanks for the catch.

[cfgfung]

Add GPU Benchmark result:

A100 - 80GB , CUDA 12.2 , NVIDIA-SMI 535.54.03
With BF16 Autocast:
n_iterations: 20
Total latency (ms): 138.54217529296875
Average latency (ms): 6.9271087646484375

[cfgfung]

Hi,

Some updates here:

• Tested with 'make style' to align the code styles.
• Added and updated related readmes.
• Intentionally not adding test cases as this is a simple example
• This is a TIMM model and does not belong to Transformer module. The current existing codes in run_image_classification.py are not compatible with TIMM model. Therefore I separate this into another file. run_timm_example.py.

[libinta]

@cfgfung can you rebase and provide the latest test result. thanks

[cfgfung]

@cfgfung can you rebase and provide the latest test result. thanks

Hi,
I have applied rebase on this branch and added test cases.