Add Maxine BNR 2.0 network implementation to NeMo

[nitin9252]

What does this PR do ?

Add Maxine BNR 2.0 network implementation to NeMo

Collection: Audio

Changelog

• Add initial implementation of network + training script/tutorial

Usage

• You can potentially add a usage example below
  Please refer to added training script/tutorial

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• New Feature
• Bugfix
• Documentation

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Additional Information

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[github-actions]

This PR is stale because it has been open for 14 days with no activity. Remove stale label or comment or update or this will be closed in 7 days.

[anteju]

LGTM!
Approved, conditioned on CI passing.

[chtruong814]

@anteju @nitin9252

I believe currently we'll need to import guard torchaudio. Here's how I see it currently being imported in the code and tests for example.
https://github.com/NVIDIA/NeMo/blob/9d4e41e5d73a7ffeabb00a1f36982716b306dd93/nemo/collections/audio/modules/transforms.py#L24

https://github.com/NVIDIA/NeMo/blob/9d4e41e5d73a7ffeabb00a1f36982716b306dd93/tests/collections/audio/test_audio_transforms.py#L195

[anteju]

Add guards for torchaudio:
#12655 (comment)

[chtruong814]

Canceling the CI runs until after the updates are done to add the torchaudio import guards.

[anteju]

@nitin9252, there are many issues with linting:
https://github.com/NVIDIA/NeMo/actions/runs/14481173762

Could you please check these locally and update the PR once all are fixed (and the unit tests are passing locally as well)?

[anteju]

Looks good for now. Thanks!

Next step: please work on getting rid of torchaudio dependency and improving test coverage.