1. remove the feature redundant name in all feature controllers(e.g.
'federatedlearningJob' to 'job'), since it has already own independent
package, no need the feature extra name
2. upstream interface optimizaztion
3. fix empty Kind of all CR in downstream
4. add extra doc string
5. fix code style

Signed-off-by: llhuii <liulinghui@huawei.com>

Split upstream controller, merge each feature CR logic code into its
controller.

Signed-off-by: llhuii <liulinghui@huawei.com>

All controllers are placed into globalmanager/controllers:
1. each feature has the independent subdirectory
2. upstream/downstream are kept as top level.

Commom types/utils/worker.go are placed into globalmanager/runtime.

Signed-off-by: llhuii <liulinghui@huawei.com>