chore: remove addon-resizer from VHD

[jackfrancis]

Reason for Change:

The addon-resizer container image was pre-baked into the Linux VHDs for historical reasons, but is no longer a dependency of any aks-engine-provided Kubernetes components.

Issue Fixed:

Credit Where Due:

Does this change contain code from or inspired by another project?

• No
• Yes

If "Yes," did you notify that project's maintainers and provide attribution?

• No
• Yes

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Notes:

[jackfrancis]

cc @jadarsie

[codecov]

Codecov Report

Merging #4269 (ed93655) into master (3497425) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4269   +/-   ##
=======================================
  Coverage   72.07%   72.07%           
=======================================
  Files         141      141           
  Lines       21686    21686           
=======================================
  Hits        15630    15630           
  Misses       5106     5106           
  Partials      950      950           

---

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[mboersma]

/lgtm

[acs-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jackfrancis, mboersma

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