Include tensor folder tests in package distribution

Author: vlad-perevezentsev

setup.py

@@ -56,6 +56,8 @@
             "dpnp_backend_c.dll",
             "tests/*.*",
             "tests/testing/*.py",
+            "tests/tensor/*.py",
+            "tests/tensor/*/*.py",
             "tests/third_party/cupy/*.py",
             "tests/third_party/cupy/*/*.py",
             "tests/third_party/cupyx/*.py",