Changing tensor copy to remove user warning in logAUC

[VijayVignesh1]

What does this PR do?

Fixes #3278

Before submitting

• Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

PR review

Modified the line that raises userwarning in _binary_logauc_compute function.

Anyone in the community is free to review the PR once the tests have passed.
If we didn't discuss your PR in Github issues there's a high chance it will not be merged.

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📚 Documentation preview 📚: https://torchmetrics--3295.org.readthedocs.build/en/3295/

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 31%. Comparing base (e958058) to head (e4482e2).
⚠️ Report is 1 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (e958058) and HEAD (e4482e2). Click for more details.

HEAD has 132 uploads less than BASE

Flag	BASE (e958058)	HEAD (e4482e2)
Windows	6	2
cpu	48	16
python3.12	12	4
torch2.8.0+cpu	9	3
Linux	36	12
python3.10	33	11
torch2.0.1+cpu	9	3
torch2.7.1+cpu	6	2
macOS	6	2
torch2.0.1	3	1
python3.9	3	1
torch2.2.2+cpu	3	1
gpu	2	0
unittest	2	0
torch2.5.1+cpu	3	1
torch2.1.2+cpu	3	1
torch2.3.1+cpu	3	1
torch2.4.1+cpu	3	1
torch2.6.0+cpu	3	1
torch2.8.0	3	1

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #3295     +/-   ##
========================================
- Coverage      37%     31%     -6%     
========================================
  Files         364     349     -15     
  Lines       20098   19903    -195     
========================================
- Hits         7520    6168   -1352     
- Misses      12578   13735   +1157     

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