Remove validation image from our Dockerfile

[antoine-gaillard]

We actually don't need to check if libraries are present as we install the required binaries using apt instead of cherry-picking libs and binaries from a different image.

[k8s-ci-robot]

Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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[linux-foundation-easycla]

• ✅ login: Fricounet / name: Baptiste Girard-Carrabin (7293ccf)
• ❌ - login: @antoine-gaillard . The commit (6895a0b, 246d7e2, 126509e, 3eb8930, ab4af42, 54cdd8f) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please submit a support request ticket.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: antoine-gaillard
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[k8s-ci-robot]

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[k8s-ci-robot]

Hi @antoine-gaillard. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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