Introduce `make` targets for setup/restore local-manual-setup in mcm-providers

[himanshu-kun]

How to categorize this issue?

/area usability /kind enhancement /priority 2

What would you like to be added:

https://github.com/gardener/machine-controller-manager/issues/846 introduced make targets in MCM Makefile to ease setting up dynamic variables for local testing of MCM and MCM-providers. But such make targets should be added in mcm-provider Makefile also as their development could be done standalone, and thus should not depend on MCM make targets. The README.md(for example provider-aws) files under mcm-providers should be updated as well

• [ ] aws
• [ ] alicloud
• [ ] gcp
• [ ] azure (include the changes in https://github.com/gardener/machine-controller-manager-provider-azure/pull/124)
• [ ] openstack

Why is this needed: Ease of development

[sssash18]

Fixed by:

• https://github.com/gardener/machine-controller-manager-provider-aws/pull/158
• https://github.com/gardener/machine-controller-manager-provider-azure/pull/141
• https://github.com/gardener/machine-controller-manager-provider-gcp/pull/113
• https://github.com/gardener/machine-controller-manager-provider-alicloud/pull/77
• https://github.com/gardener/machine-controller-manager-provider-openstack/pull/127