PyTorch Lightning 1.7.7: Standard patch release

[1.7.7] - 2022-09-22

Fixed

• Fixed the availability check for the neptune-client package (#14714)
• Break HPU Graphs into two parts (forward + backward as one and optimizer as another) for better performance (#14656)
• Fixed torchscript error with ensembles of LightningModules (#14657, #14724)
• Fixed an issue with TensorBoardLogger.finalize creating a new experiment when none was created during the Trainer's execution (#14762)
• Fixed TypeError on import when torch.distributed is not available (#14809)

Contributors

@awaelchli @Borda @carmocca @dependabot @otaj @raoakarsha

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