Missing Debug derive for Group Norm Config

[Arjun31415]

Pull Request Template

Checklist

• Confirmed that run-checks all script has been executed.
• Made sure the book is up to date with changes in this PR.

Related Issues/PRs

I had an Issue pop up while using enums

#[derive(Debug,Clone,Serialize,Deserialize)]
pub enum NormalizationType {
    BatchNorm(BatchNormConfig),
    GroupNorm(GroupNormConfig),
}

1. `GroupNormConfig` doesn't implement `Debug`
   the trait `Debug` is not implemented for `GroupNormConfig`, which is required by `&GroupNormConfig: Debug`

So I just added the derive

Changes

Added Debug to GroupNormConfig

Testing

Describe how these changes have been tested.

[Arjun31415]

I think it needs to be added to Instance and Layer norm too

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 85.78%. Comparing base (cf3c1ca) to head (4216f3b).

Files	Patch %	Lines
crates/burn-core/src/nn/norm/group.rs	0.00%	1 Missing ⚠️
crates/burn-core/src/nn/norm/instance.rs	0.00%	1 Missing ⚠️
crates/burn-core/src/nn/norm/layer.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1482   +/-   ##
=======================================
  Coverage   85.77%   85.78%           
=======================================
  Files         649      649           
  Lines       72414    72414           
=======================================
+ Hits        62116    62119    +3     
+ Misses      10298    10295    -3     

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