fix torch-tensorrt dependency in testing

[GdoongMathew]

What does this PR do?

Fixes #21412

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---

📚 Documentation preview 📚: https://pytorch-lightning--21413.org.readthedocs.build/en/21413/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79%. Comparing base (9ae18f7) to head (f67cbe1).
✅ All tests successful. No failed tests found.

❗ There is a different number of reports uploaded between BASE (9ae18f7) and HEAD (f67cbe1). Click for more details.

HEAD has 1146 uploads less than BASE

Flag	BASE (9ae18f7)	HEAD (f67cbe1)
python3.12.7	80	9
lightning_fabric	74	0
pytest	149	0
cpu	289	30
python3.12	89	9
python3.10	30	3
lightning	140	15
python3.11	60	6
python	30	3
pytorch_lightning	75	15
pytorch2.7	15	3
pytest-full	140	30
pytorch2.1	30	6
pytorch2.2.2	15	3
pytorch2.6	15	3
pytorch2.3	15	3
pytorch2.8	15	3
pytorch2.4.1	10	3
pytorch2.9	15	3
pytorch2.5.1	10	3

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #21413     +/-   ##
=========================================
- Coverage      86%      79%     -8%     
=========================================
  Files         269      266      -3     
  Lines       23809    23754     -55     
=========================================
- Hits        20574    18719   -1855     
- Misses       3235     5035   +1800