Pre release for v2.1.8

[jrakas-dev]

What is this PR about? / Why do we need it?
Pre-release PR for 2.1.8. Update Changelog, README, Makefile

[k8s-ci-robot]

Hi @jrakas-dev. Thanks for your PR.

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[dankova22]

/ok-to-test
/lgtm
/approve

[dankova22]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: dankova22, jrakas-dev
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