chore: switch to using multi-os image, update docs

[aramase]

Signed-off-by: Anish Ramasekar anish.ramasekar@gmail.com

Reason for Change:

• Updates image in examples, docs and e2e to k8s.gcr.io/e2e-test-images/busybox:1.29 multi-platform image.
• Updates ingress manifest in example to reflect current state.
• Removes windows specific manifests as all the manifests should work in linux and windows.

Requirements

• squashed commits
• included documentation
• added unit tests and e2e tests (if applicable).

Issue Fixed:

fixes #411

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

• Yes
• No

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

Special Notes for Reviewers:

[aramase]

/azp run pr-e2e-azure

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov-io]

Codecov Report

Merging #416 (89a7d0a) into master (0253083) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #416   +/-   ##
=======================================
  Coverage   62.86%   62.86%           
=======================================
  Files           6        6           
  Lines         474      474           
=======================================
  Hits          298      298           
  Misses        144      144           
  Partials       32       32           

[sozercan]

LGTM