Ensure addon-resizer 1.8.11 only effective at arch amd64.

[zhengtianbao]

k8s.gcr.io/addon-resizer:1.8.11 returns the amd64 image which is not executable at arm64.

Disable addon-resizer when the platform is not amd64.

When metrics-server upgrade and use addon-resizer:2.3, then revert this
commit and image_arch will determine the addon_resizer_image_tag.

What type of PR is this?

/kind bug

What this PR does / why we need it:

Disable addon-resizer of metrics-server except at platform amd64 because of k8s.gcr.io/addon-resizer:1.8.11 image only support architecture amd64.

Which issue(s) this PR fixes:

Fixes #8121

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Fail metrics-server installation when `addon-resizer` is used on a platform different than amd64

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[k8s-ci-robot]

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[floryut]

@zhengtianbao Thank you for the PR

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: floryut, zhengtianbao

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[oomichi]

/cc @oomichi

[oomichi]

How about adding a check into roles/kubernetes-apps/metrics_server/tasks/main.yml instead?
That would be helpful to let operators know the metrics_server_resizer is not available on other architectures than amd64:

- name: check host_architecture is amd64 for metrics_server_resizer
  assert:
    that: host_architecture == "amd64"
  when: metrics_server_resizer

[zhengtianbao]

Thanks for your advice, done.

[oomichi]

Thanks for updating.

/ok-to-test
/lgtm

[jayonlau]

/lgtm