[ENH] Test coverage for AEResNetNetwork Improved

[lucifer4073]

Reference Issues/PRs

Contributes to a part of #2497.

What does this implement/fix? Explain your changes.

The following implementation adds test cases for every parameter of AEResNetNetwork in networks module.

Does your contribution introduce a new dependency? If yes, which one?

No

Any other comments?

This update ensures better maintainability of the AEResNetNetwork class by testing edge cases for various configurations

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Thank you for contributing to aeon

I have added the following labels to this PR based on the title: [ $\color{#FEF1BE}{\textsf{enhancement}}$ ].
I have added the following labels to this PR based on the changes made: [ $\color{#379E11}{\textsf{networks}}$ ]. Feel free to change these if they do not properly represent the PR.

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[MatthewMiddlehurst]

Thanks, this looks good but will give it a bit for others to review. I have enabled the codecov test which may be helpful.