✨ Ability to use VCPUs

[Mattes83]

What is the purpose of this pull request/Why do we need it?
This allows to use server type VCPU instead of ENTERPRISE.

Issue #, if available:
#129

Description of changes:
Added new type field "Type" (default ENTERPRISE) to IonosCloudMachineSpec and use it in buildServerProperties.

[lubedacht]

For the next time, please stick to the style guide when adding additional commits to a PR

cluster-api-provider-ionoscloud/docs/style-guide.md

Line 37 in 5c5c2e6

- Don’t force-push your git branch after someone started reviewing it. Changing the history makes it harder for a reviewer to find the exact diff, e.g. since the reviewer had a look the last time.

[Mattes83]

Ah sorry for that. I see I should not have resolved your comments either.

[lubedacht]

I just noticed an issue with the tests. I was confused that there are no updated tests in server_test.go. The mockCreateServer call was done with mock.Anything and this is actually not good. We should have an expectation and we should have tests for VCPU and Enterprise.

Would you be so kind to update the tests so we can ensure that the correct values are passed to the CreateServer call?
I know this will require to update multiple tests but will definitely improve our test quality.

[Mattes83]

I am now testing for VCPU or ENTERPRISE

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[Mattes83]

I guess I handled all remarks, please let me know if there is more I should change

[Mattes83]

@lubedacht I guess I can merge the PR now?