Cherypick pull request #884 from shuaich/remove_elevated_permission to release-0.4

[shuaich]

Remove elevated permissions from metrics-server

What this PR does / why we need it:
This PR cherrypicks #884
With this PR, we are able to remove elevated permissions from metrics-server.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
None

[k8s-ci-robot]

Hi @shuaich. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[shuaich]

/assign @dgrisonnet
/assign @serathius
/assign @s-urbaniak

[serathius]

/ok-to-test

[serathius]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: serathius, shuaich

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