feat: add snyk file to exclude vendor folders

[oshoval]

What this PR does / why we need it:
This file is used for snyk integration to config snyk scan.

Special notes for your reviewer:

Release note:

None

[oshoval]

/cherry-pick release-0.9.1

[kubevirt-bot]

@oshoval: once the present PR merges, I will cherry-pick it on top of release-0.9.1 in a new PR and assign it to you.

In response to this:

/cherry-pick release-0.9.1

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[oshoval]

/cc @RamLavi @qinqon @phoracek
can you please review?

[qinqon]

/lgtm
/approve

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: qinqon

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[kubevirt-bot]

@oshoval: new pull request created: #70

In response to this:

/cherry-pick release-0.9.1

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.