fix: Storage class editing automatic extension maximum value does not take effect

Created by: weili520

What type of PR is this?

/kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes ##3405 (closed),###3406 (closed)

Special notes for reviewers:

4):

Does this PR introduced a user-facing change?

NONE

Additional documentation, usage docs, etc.: