fix: Add test for issue #2049

[gabyx]

Add some more tests:
This missing files problem should be already fixed by PR #2066.

Fixes #2049

Description

Added a test to check existance of binary files.

Submitter Checklist

These are the criteria that every PR should meet, please check them off as you
review them:

• Includes unit tests
• Adds integration tests if needed.

Reviewer Notes

• The code flow looks good.
• Unit tests and or integration tests added.

[itscaro]

I'm using an image alpine with git and some wrapper scripts along with kaniko binary. When I build an image from alpine:

OK: binaries found in final image

apk add curl bash

KO: no binaries found in final image

apk add curl bash git

Something bugs with git?

I'm using kaniko image only, the two cases work well

[gabyx]

Autsch, thats interesting. Can you post Docker example which raises the problem. Thanks!