* py-tensorflow: 2.4.0 and dependency updates
* minor version updates
* fix numpy dependency
* dependency rework: compatible release issues, start to clarify cuda versions
* --incompatible_no_support_tools_in_action_inputs was removed in bazel 3.6
* adjustment to versions of cuda dependency, also make sure that
patches/filters still apply to certain release trains.
* python 3.8 and tf < 2.2 have issues
* missed py-grpcio version bump
0c1e99b3c8