fix get device ids when a specific number of devices are to be replicated

[KubeKyrie]

What type of PR is this?
/kind bug

What this PR does / why we need it:

When a specific number of devices for this resource type are to be replicated, every time we get device ids different. Because the traversal map is unordered.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Flag	Coverage Δ
unittests	44.00% <ø> (-0.10%)	⬇️

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see 1 file with indirect coverage changes

[wawa0210]

@lengrongfu Can you help review this pr ?

[lengrongfu]

There is no logical problem with the code, but I still do not recommend modifying it.

1. The code in the pkg/device-plugin directory comes from the repository https://github.com/NVIDIA/k8s-device-plugin. The upstream logic is also handled in this way. Do not modify the code in this directory unless necessary to facilitate subsequent tracking of the upstream code.
2. In the current logic, the order of maps does not affect the results.

Mainly because of the first point I do not recommend making any changes.

@KubeKyrie