Add information for supported Python versions to setup.py (#1502)

Adds qualifiers for Python 3.9-3.11 indicating them being supported in the Python bindings building.

Support for Python 3.6 was removed, so the indicator for Python 3.6 was removed.

setup.py

@@ -147,9 +147,11 @@ def bazel_build(self, ext):
         "Intended Audience :: Developers",
         "Intended Audience :: Science/Research",
         "License :: OSI Approved :: Apache Software License",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
         "Topic :: Software Development :: Testing",
         "Topic :: System :: Benchmark",
     ],