Stopword support for in-framework deployment

[oyilmaz-nvidia]

Describe the bug

We need to have stop word support for the inference to improve the accuracy during nemo eval.

[oyilmaz-nvidia]

We need to get @shanmugamr1992 's review or someone from mcore team.

[oyilmaz-nvidia]

This should be later added to the mcore. Check with @shanmugamr1992 .