deprecate: root project_id attribute is deprecated in resource

Author: AgustinBettati

mongodbatlas/resource_project_api_key.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+	"github.com/mongodb/terraform-provider-mongodbatlas/internal/common/constant"
 	"github.com/mongodb/terraform-provider-mongodbatlas/internal/common/conversion"
 	"github.com/mongodb/terraform-provider-mongodbatlas/internal/config"
 	"go.mongodb.org/atlas-sdk/v20231115001/admin"
@@ -30,8 +31,9 @@ func ResourceProjectAPIKey() *schema.Resource {
 		},
 		Schema: map[string]*schema.Schema{
 			"project_id": {
-				Type:     schema.TypeString,
-				Optional: true,
+				Type:       schema.TypeString,
+				Optional:   true,
+				Deprecated: fmt.Sprintf(constant.DeprecationParamByVersion, "1.16.0"),
 			},
 			"api_key_id": {
 				Type:     schema.TypeString,

website/docs/r/project_api_key.html.markdown

@@ -46,7 +46,7 @@ resource "mongodbatlas_project_api_key" "test" {
 ## Argument Reference
 
 * `description` - (Required) Description of this Project API key.
-* `project_id` - Unique 24-hexadecimal digit string that identifies your project.
+* `project_id` - Unique 24-hexadecimal digit string that identifies your project. **WARNING:** this parameter is deprecated as it no longer needs to be defined. It will be removed in version 1.16.0.
 
 ~> **NOTE:** Project created by API Keys must belong to an existing organization.