Update total storage size when changing size of artifacts

What does this MR do?

Fixes regression for storage size introduced by !17839 (merged)

Increasing artifacts size needs to increase total storage size, too.

Are there points in the code the reviewer needs to double check?

Not that I know of.

Why was this MR needed?

To fix a bug.

Screenshots (if relevant)


Does this MR meet the acceptance criteria?

What are the relevant issue numbers?

This fixes one of things reported in #49368 (moved)

Edited by Kamil Trzciński

Merge request reports