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.
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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 (fd967c0) to head (b7fee0b).

❌ Your project check has failed because the head coverage (31%) is below the target coverage (95%). You can increase the head coverage or adjust the target coverage.

❗ There is a different number of reports uploaded between BASE (fd967c0) and HEAD (b7fee0b). Click for more details.

HEAD has 72 uploads less than BASE

Flag	BASE (fd967c0)	HEAD (b7fee0b)
gpu	2	0
unittest	2	0
Windows	4	2
cpu	34	17
python3.12	8	4
torch2.8.0+cpu	6	3
torch2.0.1+cpu	6	3
python3.10	24	12
torch2.8.0	2	1
macOS	6	3
Linux	24	12
torch2.7.1+cpu	4	2
torch2.4.1+cpu	2	1
torch2.2.2+cpu	2	1
torch2.0.1	4	2
torch2.5.1+cpu	2	1
torch2.1.2+cpu	2	1
torch2.6.0+cpu	2	1
torch2.3.1+cpu	2	1
python3.9	2	1

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #3295     +/-   ##
========================================
- Coverage      37%     31%     -6%     
========================================
  Files         364     349     -15     
  Lines       20096   19901    -195     
========================================
- Hits         7520    6168   -1352     
- Misses      12576   13733   +1157     

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