[shardformer] support Blip2 (#4243)

* support base blip2

* add support for downstream blip2 model

* update readme

* add forward injection

* skip not compatible models test

* fix test for gemini and low_level_zero_pugin

tests/kit/model_zoo/transformers/__init__.py

@@ -1,5 +1,6 @@
 from .albert import *
 from .bert import *
+from .blip2 import *
 from .bloom import *
 from .chatglm import *
 from .gpt import *