🚀 Add XPU accelerator

[ashwinvaidya17]

📝 Description

• Add XPU accelerator

anomalib train --model Padim --data MVTec --trainer.accelerator xpu --trainer.strategy xpu_single

✨ Changes

Select what type of change your PR is:

• 🐞 Bug fix (non-breaking change which fixes an issue)
• 🔨 Refactor (non-breaking change which refactors the code base)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🔒 Security update

✅ Checklist

Before you submit your pull request, please make sure you have completed the following steps:

• 📋 I have summarized my changes in the CHANGELOG and followed the guidelines for my type of change (skip for minor changes, documentation updates, and test enhancements).
• 📚 I have made the necessary updates to the documentation (if applicable).
• 🧪 I have written tests that support my changes and prove that my fix is effective or my feature works (if applicable).

For more information about code review checklists, see the Code Review Checklist.

[codecov]

Codecov Report

Attention: Patch coverage is 69.81132% with 16 lines in your changes missing coverage. Please review.

Project coverage is 79.06%. Comparing base (084331d) to head (33a0e0e).
Report is 21 commits behind head on main.

Files with missing lines	Patch %	Lines
src/anomalib/engine/accelerator/xpu.py	61.29%	12 Missing ⚠️
src/anomalib/engine/strategy/xpu_single.py	73.33%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2530      +/-   ##
==========================================
+ Coverage   78.94%   79.06%   +0.11%     
==========================================
  Files         311      315       +4     
  Lines       13197    13253      +56     
==========================================
+ Hits        10419    10478      +59     
+ Misses       2778     2775       -3     

Flag	Coverage Δ
integration_py3.10	64.52% <69.81%> (?)
unit_py3.10	64.72% <69.81%> (?)

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[samet-akcay]

Thanks a lot!