* support registering partial functions

* Update mmengine/registry/build_functions.py

Co-authored-by: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>

* Update mmengine/registry/registry.py

Co-authored-by: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>

* Revert unit test and refine

* add current logger and set log level

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Co-authored-by: Mashiro <57566630+HAOCHENYE@users.noreply.github.com>
Co-authored-by: HAOCHENYE <21724054@zju.edu.cn>