fix(ci): Use python venv for mdns target tests

.github/workflows/mdns__build-target-test.yml

@@ -76,6 +76,22 @@ jobs:
       - name: Run ${{ matrix.test.app }} application on ${{ matrix.idf_target }}
         working-directory: components/mdns/${{ matrix.test.path }}
         run: |
+            export PYENV_ROOT="$HOME/.pyenv"
+            export PATH="$PYENV_ROOT/bin:$PATH"
+            eval "$(pyenv init --path)"
+            eval "$(pyenv init -)"
+            if ! pyenv versions --bare | grep -q '^3\.12\.6$'; then
+              echo "Installing Python 3.12.6..."
+              pyenv install -s 3.12.6
+            fi
+            if ! pyenv virtualenvs --bare | grep -q '^myenv$'; then
+              echo "Creating pyenv virtualenv 'myenv'..."
+              pyenv virtualenv 3.12.6 myenv
+            fi
+            pyenv activate myenv
+            python --version
+            pip install --prefer-binary cryptography pytest-embedded pytest-embedded-serial-esp pytest-embedded-idf pytest-custom_exit_code esptool
+            pip install --extra-index-url https://dl.espressif.com/pypi/ -r $GITHUB_WORKSPACE/ci/requirements.txt
             unzip ci/artifacts.zip -d ci
             for dir in `ls -d ci/build_*`; do
             rm -rf build sdkconfig.defaults