Remove TF_NEED_KAFKA from configure.py as it is not needed anymore. (#17565)

* Remove TF_NEED_KAFKA from configure.py as it is not needed anymore.

With the new update in kafka dataset support, it looks like
TF_NEED_KAFKA is not needed any more as we are loading .so
dynamically. For that I think it makes sense to remove TF_NEED_KAFKA
option from configure.py.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Remove with_kafka_support from tensorflow/BUILD

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Disable kafka module if with_kafka_support is false

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Add flag of with_kafka_support_windows_override

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Remove duplication of kafka in bazel BUILD

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>