[DOCS] fix tutorials for v2.0 (#422)

- Fix meta-parameter usage on tutorials.
- Install tutorial dependencies on CI.
- Switch from `requirements-test.txt` to `extras_require` for test dependencies, and also use it for tutorial dependencies.
- Make some performance tests deterministic.

python/setup.py

@@ -126,7 +126,11 @@ setup(
     description="A language and compiler for custom Deep Learning operations",
     long_description="",
     packages=["triton", "triton/_C", "triton/language", "triton/tools", "triton/ops", "triton/ops/blocksparse"],
-    install_requires=["cmake", "torch", "filelock"],
+    install_requires=[
+        "cmake",
+        "filelock",
+        "torch",
+    ],
     package_data={"triton/ops": ["*.c"], "triton/ops/blocksparse": ["*.c"]},
     include_package_data=True,
     ext_modules=[CMakeExtension("triton", "triton/_C/")],
@@ -142,4 +146,16 @@ setup(
         "License :: OSI Approved :: MIT License",
         "Programming Language :: Python :: 3.6",
     ],
+    extras_require={
+        "tests": [
+            "numpy",
+            "pytest",
+            "scipy>=1.7.1",
+        ],
+        "tutorials": [
+            "matplotlib",
+            "pandas",
+            "tabulate",
+        ],
+    },
 )