[ENH] Test coverage for AEAttentionBiGRUNetwork Improved

[lucifer4073]

Reference Issues/PRs

Contributes to #2497. Reference PRs #2518 and #2534.

What does this implement/fix? Explain your changes.

The given issue improvises the test coverage of AEAttentionBiGRUNetwork class.

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

No.

Any other comments?

No.

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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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[lucifer4073]

Refer issue #2560

[hadifawaz1999]

@lucifer4073 after getting #2771 merged, you can update to main here, make sure temporal latent space is tested properly, take care of @baraline 's comments and then we can merge this one

[lucifer4073]

Hi @baraline,

I have made the required changes. Have a look at it and let me know if anything else is required. Thanks