add enableTaints option to enable taint support in the crd

[chr15p]

It is currently not possible to enable taints support from the operator, this PR adds that behaviour by adding an spec.enableTaints: boolean option to the nodefeaturediscoveries crd. This option is false by default, but when set to true adds the --enable-taints switch to the master args.

This is false by default, and commented out in the sample config because it is still rated as "experimental" but this allows brave users to test it.

[k8s-ci-robot]

Hi @chr15p. Thanks for your PR.

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[marquiz]

/ok-to-test

[yevgeny-shnaidman]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chr15p, marquiz, yevgeny-shnaidman

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