Add support for IAM policies (beta)

[fehrnah]

Description

This adds support for IAM policies, which are currently in private beta.

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Since the IAM is currently in beta, test must be performed on an account which is participating in the beta.

• Test A: make testacc TESTARGS="-run TestAccDataSourceXxxxYyyyZzzzz_basic"

Test Configuration:

• Terraform version: terraform version: Terraform v1.4.6
• Existing HCL configuration you used:

# Create a user group and give it the permissions required to connect to the manager 
data "ovh_me" "account" {}

resource "ovh_me_identity_group" "my_group" {
  name         = "my_group"
  description = "Terraform created group"
}

resource "ovh_iam_policy" "manager" {
  name         = "manager"
  description = "Members of my_group can connect to the manager"
  identities    = [ovh_me_identity_group.my_group.urn]
  resources   = [data.ovh_me.account.urn]
  allow = [
    "account:apiovh:me/get",
    "account:apiovh:me/supportLevel/get",
    "account:apiovh:me/certificates/get",
    "account:apiovh:me/tag/get",
    "account:apiovh:services/get",
    "account:apiovh:*",
  ]
}

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 successfully go mod vendor if I added or modify go.mod file

[scraly]

Suggested change

	* `resources` - List of resources the policy.
	* `resources` - List of resources affected by the policy.

[scraly]

several remarks, questions and suggestions :)

[scraly]

Here an example of how an ID of a data source that list registry capabilities is setted:
https://github.com/ovh/terraform-provider-ovh/blob/master/ovh/data_cloud_project_capabilities_containerregistry.go

just a hash generated with the string in input

and here you can find what to say for the ID in the doc:
https://registry.terraform.io/providers/ovh/ovh/latest/docs/data-sources/cloud_project_capabilities_containerregistry

For this kind of ID is not easy and suepr useful but I think we need to documente very fields :)

[rbeuque74]

Hello,

I found some flaws that we would have to address before merging this one.
Let's talk about it if you think I'm in the wrong :)

Romain