Add documentation for google_privileged_access_manager_entitlement da…

…ta source (GoogleCloudPlatform#11984)

mmv1/third_party/terraform/website/docs/d/privileged_access_manager_entitlement.html.markdown

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+---
+subcategory: "Privileged Access Manager"
+description: |-
+  Get information about a Google Cloud Privileged Access Manager Entitlement.
+---
+
+# google_privileged_access_manager_entitlement
+
+Use this data source to get information about a Google Cloud Privileged Access Manager Entitlement.
+
+To get more information about Privileged Access Manager, see:
+
+* [API Documentation](https://cloud.google.com/iam/docs/reference/pam/rest)
+* How-to guides
+  * [Official documentation](https://cloud.google.com/iam/docs/pam-overview)
+
+## Example Usage
+
+```hcl
+data "google_privileged_access_manager_entitlement" "my-entitlement" {
+  parent  = "projects/my-project"
+  location = "global"
+  entitlement_id = "my-entitlement"
+}
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `parent` - (Required) The project or folder or organization that contains the resource. Format: projects/{project-id|project-number} or folders/{folder-number}  or organizations/{organization-number}
+* `location` - (Required) The region of the Entitlement resource.
+* `entitlement_id` - (Required) ID of the Entitlement resource. This is the last part of the Entitlement's full name which is of the format `{parent}/locations/{location}/entitlements/{entitlement_id}`.
+
+## Attribute Reference
+
+See [google_privileged_access_manager_entitlement](https://registry.terraform.io/providers/hashicorp/google-beta/latest/docs/resources/privileged_access_manager_entitlement#argument-reference) for details of the available attributes.