[BUILD] Add missing subpackages to build (#1475)

The `triton/compiler`, `triton/runtime/driver`, and `triton/third_party`
subpackages were missing from the distribution built with the old
`setup.py` after #1464, causing an immediate error upon importing Triton
with a non-editable installation. This change adds the missing Python
subpackages and moves `triton/third_party` inclusion to `MANIFEST.in`,
where it will automatically be included in wheels due to the existing
`include_package_data` setup flag.

python/setup.py

@@ -221,16 +221,18 @@ setup(
     packages=[
         "triton",
         "triton/_C",
-        "triton/language",
-        "triton/tools",
         "triton/common",
+        "triton/compiler",
+        "triton/language",
         "triton/ops",
+        "triton/ops/blocksparse",
         "triton/runtime",
-        "triton/ops/blocksparse"],
+        "triton/runtime/driver",
+        "triton/tools",
+    ],
     install_requires=[
         "filelock",
     ],
-    package_data={"triton": ["third_party/**/*"]},
     include_package_data=True,
     ext_modules=[CMakeExtension("triton", "triton/_C/")],
     cmdclass={"build_ext": CMakeBuild},