Storyboard background offset is not supported

Describe the bug: Currently, people use the background offset feature in [Events] section that's found in .osu files, to properly adjust backgrounds so they fit the taiko playfield

However, this feature doesn't work at all in lazer, which results in backgrounds being improperly cut off by the playfield.

Screenshots or videos showing encountered issue:

How it looks in stable:

How it looks in lazer:

osu!lazer version: 2021.809.0-lazer

Logs: logs.zip