Feature machine deployment annotations

[ffuerste]

What this PR does / why we need it: It allows to define .meteadata.annotations for MachineDeployment resources in a KubeOne configuration file (.dynamicWorkers.providerSpec.annotations).
Among other possible use cases, it allows to define the cluster-autoscaler clusterapi annotations alongside other attributes for worker node groups in a KubeOne config file.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #1133

Special notes for your reviewer:
The PR is based on the current kubeone master branch. The zz_generated.* files were created with the provided script hack/update-codegen.sh and verified with hack/verify-codegen.sh.

Does this PR introduce a user-facing change?:

No breaking changes are introduced with this PR.
User can optionally define annotations for `dynamicWorkers` elements in a KubeOne config file, which are used for the corresponding `MachineDeployment` resource.

[kubermatic-bot]

Hi @ffuerste. Thanks for your PR.

I'm waiting for a kubermatic 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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[xmudrii]

/test all

[ffuerste]

/retest

[kubermatic-bot]

@ffuerste: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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[xmudrii]

/test all

[ffuerste]

/retest

[kubermatic-bot]

@ffuerste: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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.

[xmudrii]

/retest

[kubermatic-bot]

LGTM label has been added.

Git tree hash: 7a7bbd03bd349ca9621c08a18e754cbc9e09f9bf

[xmudrii]

Thank you for the PR!

/lgtm
/approve

[kubermatic-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ffuerste, xmudrii

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[ffuerste]

Thanks for merging and the amazing fast replies.