[Tests] Update speech diarization and WavLM tolerances
# What does this PR do?

Turns out the difference in `nn.GroupNorm` between torch `1.9` and `1.10` (https://github.com/pytorch/pytorch/issues/67907) is more noticeable than I initially expected. This PR updates the tolerances on some newer tests where the reference values were obtained on `1.10`. When we update the CI env to `1.10`, these can be safely reverted.

`FAILED examples/pytorch/test_examples.py::ExamplesTests::test_run_image_classification` is unrelated, merging...