[MMSIG] Add resize, padding function to pixeldata#1416

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CescMessi wants to merge 4 commits intoopen-mmlab:mainfrom

CescMessi:CescMessi/pixeldata_add_resize_padding

Commits on Oct 28, 2023

add resize to pixel_data
CescMessi
committed

Commits on Oct 29, 2023

add test_resize to test_pixel_data
CescMessi
committed

Commits on Oct 31, 2023

add padding to pixel_data
CescMessi
committed

Commits on Nov 1, 2023

add test_padding to test_pixel_data
CescMessi
committed