chore: Return a machine struct from the cloudprovider create call

[jonathan-innis]

Fixes #

Description

• Return a v1alpha5.Machine struct from the cloudprovider create call
• This change preps for the machine.Controller which will use the full response to update the Machine status

How was this change tested?

make test

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[coveralls]

Pull Request Test Coverage Report for Build 3946578529

• 25 of 32 (78.13%) changed or added relevant lines in 4 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.6%) to 76.909%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/cloudprovider/fake/cloudprovider.go	8	10	80.0%
pkg/cloudprovider/metrics/cloudprovider.go	0	5	0.0%

Files with Coverage Reduction	New Missed Lines	%
pkg/cloudprovider/fake/cloudprovider.go	1	94.5%

Totals
Change from base Build 3888407071:	0.6%
Covered Lines:	5822
Relevant Lines:	7570

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💛 - Coveralls