use unique name for volume

[huchengze]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:
The name is used to achieve idempotency. To create multiple volumes, we need different names.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:
Like #566

Does this PR introduce a user-facing change?:

NONE

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: huchengze / name: Gino Hu (6425730)

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