Allure report doesn't take in correct number of tests when using parametrized tests where tests parameters are duplicated

**Describe the Bug**
Allure report doesn't take in correct number of tests when using parametrized tests where tests parameters are duplicated.

**Steps to Reproduce**
1. Create a Python virtual env
2. Install allure-pytest
3. Create example tests to reproduce:

import pytest

@pytest.mark.parametrize(
'a, b',
[
(1, 1),
(1, 1)
]
)

def test_one(a, b):
assert a == b

4. Run tests using `pytest --clean-alluredir --alluredir=/tmp/allure-results`
5. Generate allure report `allure generate /tmp/allure-results/ --clean --output /tmp/allure-results/allure-report --single-file`
6. Open Allure report

**Expected Behaviour**
The report is generated without errors and the report shows 2 tests.

**Screenshots or Additional Context**
_Current version:_
pip freeze:
allure-pytest==2.14.2
allure-python-commons==2.14.2
attrs==25.3.0
iniconfig==2.1.0
packaging==25.0
pluggy==1.6.0
pytest==8.3.5

_Version 2.9.44 (expected working result):_
pip freeze:
allure-pytest==2.9.44
allure-python-commons==2.9.44
attrs==25.3.0
iniconfig==2.1.0
packaging==25.0
pluggy==1.6.0
pytest==8.3.5
six==1.17.0

**What Language are you using?**
Python 3.11.12

**What Framework/Allure Integration you are using?**
Pytest

**What version of Allure Integration you are using?**
2.34.0

**What version of Allure Report you are using?**
Latest

**Code of Conduct**
I agree to follow this project's Code of Conduct

Riproduci il problema con l'esempio parametrizzato pytest fornito e i comandi --clean-alluredir e allure generate elencati. Confronta il report generato con la versione prevista e traccia il modo in cui i parametri duplicati sono rappresentati nei risultati. È completato quando il report viene generato senza errori e visualizza 2 test.

Scritto dal modello di indicizzazione a partire dal testo della issue.