add additonal condition for prev msdd cfgs

[nithinraok]

What does this PR do ?

TitaNet model was updated but some previous configurations were not.
This PR provides support for prevevious msdd configuration versions.

Collection: SD

Changelog

• Catch the _target_ code in newer titanet versions, which is not available in previous versions.

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[tango4j]

• Changed Speaker embedding extraction to avoid torch.cat in every for loop step for speed up.
  This does not make a lot of difference in general, but if CPU is busy with other tasks, this could make some difference in processing time.

• Now, device=null and if torch.cuda.is_cuda_available() == True, then MSDD is running on GPU. This means diarization default setting will now run on GPU if cuda is available.