feat(build): add ability to push to multiple registries from github actions

[akhilerm]

Why is this PR required? What issue does it fix?:
Currently the multiarch images can be pushed only to a single registry without rebuilding. Therefore the images are by default pushed to docker hub only. This is not ideal and images should be pushed to multiple registries. This PR fixes this issue by making use of the official docker build-push-action.

What this PR does?:

• make use of docker build-push-action
• push images to quay

Does this PR require any upgrade changes?:
No

If the changes in this PR are manually verified, list down the scenarios covered::

Any additional information for your reviewer? :
Mention if this PR is part of any design or a continuation of previous PRs
QUAY_USERNAME and QUAY_TOKEN secrets need to be added to the repo

Checklist:

• Fixes #
• PR Title follows the convention of <type>(<scope>): <subject>
• Has the change log section been updated?
• Commit has unit tests
• Commit has integration tests
• (Optional) Are upgrade changes included in this PR? If not, mention the issue/PR to track:
• (Optional) If documentation changes are required, which issue on https://github.com/openebs/openebs-docs is used to track them:

[codecov-io]

Codecov Report

Merging #544 (89e4ed8) into master (368ef92) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #544   +/-   ##
=======================================
  Coverage   48.41%   48.41%           
=======================================
  Files          73       73           
  Lines        3371     3371           
=======================================
  Hits         1632     1632           
  Misses       1581     1581           
  Partials      158      158           

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[xunholy]

Appears to be CI is failing unit tests - any additional TODOs before this is ready for review?

[akhilerm]

Appears to be CI is failing unit tests - any additional TODOs before this is ready for review?

@xunholy @shubham14bajpai Will fix the unit tests, and mark it ready for review. Till then we will hold the review process.

EDIT: There seems to be a change in the VM provided by github actions, the unit-tests which checks for the OS installation disk are the ones which are failing.

[akhilerm]

@xunholy @shubham14bajpai Fixed the issue with CI builds.This PR can now be reviewed

[shubham14bajpai]

LGTM

[xunholy]

LGTM Nice changes!