Add verification of docker buildx support

[aledbf]

What this PR does / why we need it:

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Which issue/s this PR fixes

fixes #4938

How Has This Been Tested?

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added tests to cover my changes.
• All new and existing tests passed.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf

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• OWNERS [aledbf]

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[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@7ff49b2). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff            @@
##             master   #4966   +/-   ##
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  Coverage          ?   58.5%           
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  Files             ?      88           
  Lines             ?    6736           
  Branches          ?       0           
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  Hits              ?    3941           
  Misses            ?    2363           
  Partials          ?     432

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[aledbf]

/retest

[aledbf]

/retest

[aledbf]

/retest

[aledbf]

/retest

[aledbf]

/retest