Update trainingyt.py

[payal101]

Fixes #3858

Description

Replaced deprecated transforms.ToTensor() with v2.ToImage() and v2.ToDtype()
Updated Compose and Normalize to v2 namespace
Added import for torchvision.transforms.v2

Checklist

• [ x] The issue that is being fixed is referred in the description (see above "Fixes #ISSUE_NUMBER")
• [x ] Only one issue is addressed in this pull request
• [ x] Labels from the issue that this PR is fixing are added to this pull request
• [ x] No unnecessary issues are included into this pull request.

cc @subramen

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/tutorials/3862

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[svekars]

sorry this was assigned to another contributor