feat: Update UI to support creating init container and mounting the volume …

Created by: Sigboom

Signed-off-by: Daniel Doni sigboom@163.com

What type of PR is this?

/kind feature

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes https://github.com/kubesphere/kubesphere/issues/4142

Special notes for reviewers:

This is not the best solution，but it's the Simplest solution.
If you want to support more special styles, you should add a base interface for "initContainers", but it seems unnecessary now.

Does this PR introduced a user-facing change?

Update UI to support creating init container and mounting the volume.

Additional documentation, usage docs, etc.: