Add the missing pytest-xdist to compat-check-stable-stable (#673)

* Install pytest-xdist tmp to fix the failure compat-stable-stable jobs

* Auto update version

* trigger ci

* trigger ci

---------

Co-authored-by: Dev version update bot <github-actions[bot]@users.noreply.github.com>

.github/workflows/tests_linux.yml

@@ -182,6 +182,8 @@ jobs:
 
       - name: Run PennyLane-Lightning unit tests
         run: |
+          # TODO: Remove installing pytest-xdist with release v0.36.0
+          python -m pip install pytest-xdist
           cd main/
           DEVICENAME=`echo ${{ matrix.pl_backend }} | sed "s/_/./g"`
           OMP_NUM_THREADS=1 PL_DEVICE=${DEVICENAME} python -m pytest -n auto tests/ -k "not unitary_correct" $COVERAGE_FLAGS
@@ -391,6 +393,8 @@ jobs:
 
       - name: Run PennyLane-Lightning unit tests
         run: |
+          # TODO: Remove installing pytest-xdist with release v0.36.0
+          python -m pip install pytest-xdist
           cd main/
           DEVICENAME=`echo ${{ matrix.pl_backend }} | sed "s/_/./g"`
           OMP_NUM_THREADS=1 PL_DEVICE=${DEVICENAME} python -m pytest -n auto tests/ -k "not unitary_correct" $COVERAGE_FLAGS
@@ -590,6 +594,8 @@ jobs:
       - name: Run PennyLane-Lightning unit tests
         if: ${{ matrix.pl_backend != 'all'}}
         run: |
+          # TODO: Remove installing pytest-xdist with release v0.36.0
+          python -m pip install pytest-xdist
           cd main/
           DEVICENAME=`echo ${{ matrix.pl_backend }} | sed "s/_/./g"`
           PL_DEVICE=${DEVICENAME} python -m pytest tests/ $COVERAGE_FLAGS
@@ -610,6 +616,8 @@ jobs:
       - name: Run PennyLane-Lightning unit tests for lightning.qubit with all devices installed
         if: ${{ matrix.pl_backend == 'all' }}
         run: |
+          # TODO: Remove installing pytest-xdist with release v0.36.0
+          python -m pip install pytest-xdist
           cd main/
           OMP_NUM_THREADS=1 PL_DEVICE=lightning.qubit python -m pytest -n auto tests/ -k "not unitary_correct" $COVERAGE_FLAGS
           PL_DEVICE=lightning.qubit python -m pytest tests/ -k "unitary_correct" $COVERAGE_FLAGS --cov-append

pennylane_lightning/core/_version.py

@@ -16,4 +16,4 @@
    Version number (major.minor.patch[-label])
 """
 
-__version__ = "0.36.0-dev22"
+__version__ = "0.36.0-dev23"

requirements.txt

@@ -4,4 +4,5 @@ pennylane>=0.34
 pybind11
 pytest~=8.0.0
 pytest-cov
-pytest-mock
+pytest-mock
+pytest-xdist