feat: add iam_resourcegroup data and resources

[fehrnah]

Description

Add support for IAM resource groups.

Resource groups are a collection of resources that can be used when writing policies.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (improve existing resource(s) or datasource(s))
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

How Has This Been Tested?

I have done local tests of both the resource and datadources, but I am not sure how I should go for writing acceptance tests, sin I need other resources to put in a group.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings or issues
• I have added acceptance tests that prove my fix is effective or that my feature works
• New and existing acceptance tests pass locally with my changes
• I ran succesfully go mod vendor if I added or modify go.mod file

[fehrnah]

This is set as a draft because I don't know how to write the acceptance tests for the resources/datasources since I need to have at least one OVH service to be able to create a resource group.

It looks like some OVH services are given as environment variables. Can I use them here ? Or should I create new ones ?

[fehrnah]

This is set as a draft because I don't know how to write the acceptance tests for the resources/datasources since I need to have at least one OVH service to be able to create a resource group.

It looks like some OVH services are given as environment variables. Can I use them here ? Or should I create new ones ?

Ok, I've talked with people and I am adding test using resources provided in environment variables.

[ovh-cds]

CDS Report terraform-provider-ovh-testacc#2094.0 ✘
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[Stoakes]

@yomovh @rbeuque74 changes have been done. This PR ready to be reviewed again.

[yomovh]

Update in the documentation OK for me. @rbeuque74 can you check you remarks please ?

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