Don't fail copy to emptydir - v1.19

[TomSweeneyRedHat]

What type of PR is this?

/kind api-change
/kind bud
/kind cleanup
/kind deprecation
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake
/kind other

What this PR does / why we need it:

Cherry pick of #2978

How to verify it

See added tests

Which issue(s) this PR fixes:

#2964

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Copying to an empty directory in a Container during the build process will now work as expected.

[openshift-ci-robot]

@TomSweeneyRedHat: The label(s) kind/bud cannot be applied, because the repository doesn't have them

In response to this:

What type of PR is this?

/kind api-change
/kind bud
/kind cleanup
/kind deprecation
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake
/kind other

What this PR does / why we need it:

Cherry pick of #2978

How to verify it

See added tests

Which issue(s) this PR fixes:

#2964

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Copying to an empty directory in a Container during the build process will now work as expected.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: TomSweeneyRedHat

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[rhatdan]

/lgtm