[Refactor] Refacor default_hooks and train & val & test loops in configs

configs/_base_/default_runtime.py

configs/_base_/schedules/schedule_160k.py

configs/_base_/schedules/schedule_20k.py

configs/_base_/schedules/schedule_320k.py

configs/_base_/schedules/schedule_40k.py

configs/_base_/schedules/schedule_80k.py

configs/beit/upernet_beit-base_8x2_640x640_160k_ade20k.py

...s/beit/upernet_beit-large_fp16_8x1_640x640_160k_ade20k.py

...enetv1_r101-d32_lr5e-3_4x4_512x512_160k_coco-stuff164k.py

...enetv1/bisenetv1_r18-d32_4x4_1024x1024_160k_cityscapes.py

...senetv1_r18-d32_in1k-pre_4x4_1024x1024_160k_cityscapes.py

...senetv1_r18-d32_lr5e-3_4x4_512x512_160k_coco-stuff164k.py

...enetv1/bisenetv1_r50-d32_4x4_1024x1024_160k_cityscapes.py

...senetv1_r50-d32_lr5e-3_4x4_512x512_160k_coco-stuff164k.py

.../bisenetv2/bisenetv2_fcn_4x4_1024x1024_160k_cityscapes.py

.../bisenetv2/bisenetv2_fcn_4x8_1024x1024_160k_cityscapes.py

...netv2/bisenetv2_fcn_fp16_4x4_1024x1024_160k_cityscapes.py

...netv2/bisenetv2_fcn_ohem_4x4_1024x1024_160k_cityscapes.py

configs/cgnet/cgnet_512x1024_60k_cityscapes.py

configs/cgnet/cgnet_680x680_60k_cityscapes.py