Improve windows bazel python test suite. (#10305)

* Improve windows bazel python test suite.

- Create new tags, no_windows and no_windows_gpu
- Instead of a separate maintained list, use bazel tags to exclude tests.
- Tag all the python tests that are known to have issues in windows.

* Also blacklist neon_depthwise_conv_ops_test in windows.

* Only build tests in CPU windows tests.

* Only build tests in GPU windows tests.

* Also disable session_test on windows.

* Only run py tests on windows, and only build tests that are not
disabled.