Adding minor fixes

[MikyasDesta]

What does this PR do ?

Add a one line overview of what this PR aims to accomplish. it changes training config files structure to not depend on training or validation config setting Revert back Radam instead of using pytorch implementation unsorted lens in RADTTS Encoder

Collection: [Note which collection this PR will affect]

Changelog

• Add specific line by line info of high level changes in this PR.

Usage

• You can potentially add a usage example below

python examples/tts/radtts.py trainer.max_epochs=400 export_dir="/dir" model.optim.lr=0.00005 model.train_ds.dataloader_params.batch_size=16 model.validation_ds.dataloader_params.batch_size=16 train_dataset="/Training_data.json" validation_datasets="Validation_data.json" pitch_mean=202.67527982176898 pitch_std=54.12737646048864 sample_rate=44100 n_window_size=2048 n_window_stride=512 highfreq=null n_fft=2048 sup_data_path="dir_for sup_data"

Add a code snippet demonstrating how to use this

# Before your PR is "Ready for review"
**Pre checks**:
- [x ] Make sure you read and followed [Contributor guidelines](https://github.com/NVIDIA/NeMo/blob/main/CONTRIBUTING.md)
- [ ] Did you write any new necessary tests?
- [x ] Did you add or update any necessary documentation?
- [ ] Does the PR affect components that are optional to install? (Ex: Numba, Pynini, Apex etc)
  - [ ] Reviewer: Does the PR have correct import guards for all optional libraries?
  
**PR Type**:
- [ ] New Feature
- [x ] Bugfix
- [ ] Documentation

If you haven't finished some of the above items you can still open "Draft" PR.


## Who can review?

Anyone in the community is free to review the PR once the checks have passed. 
[Contributor guidelines](https://github.com/NVIDIA/NeMo/blob/main/CONTRIBUTING.md) contains specific people who can review PRs to various areas.

# Additional Information
* Related to # (issue)

[lgtm-com[bot]]

This pull request introduces 4 alerts and fixes 1 when merging 3adde755b88e91b70aac7e1f1aed8224c2d0f79a into f1825bc4b724b78c2d6ca392b616e8dc9a8cde04 - view on LGTM.com

new alerts:

• 3 for Unused import
• 1 for Unused local variable

fixed alerts:

• 1 for Unused local variable

[lgtm-com[bot]]

This pull request introduces 4 alerts and fixes 1 when merging 1b7df10dbfcefdecd6dc28980a79ee0f63281aa8 into f1825bc4b724b78c2d6ca392b616e8dc9a8cde04 - view on LGTM.com

new alerts:

• 3 for Unused import
• 1 for Unused local variable

fixed alerts:

• 1 for Unused local variable

[lgtm-com[bot]]

This pull request introduces 4 alerts and fixes 1 when merging 5b4e89697c3139f9d713f06766c4b37a29f467b3 into f1825bc4b724b78c2d6ca392b616e8dc9a8cde04 - view on LGTM.com

new alerts:

• 3 for Unused import
• 1 for Unused local variable

fixed alerts:

• 1 for Unused local variable

[github-actions[bot]]

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.

[github-actions[bot]]

This PR was closed because it has been inactive for 7 days since being marked as stale.