feat: updated cmk policies with regards to key grants

modules/security_identity_compliance/CustomerManagedKmsKeys/main.tf

@@ -236,6 +236,26 @@ data "aws_iam_policy_document" "storage" {
     ]
     resources = ["*"]
   }
+
+  statement {
+    sid    = "AllowAttachmentOfPersistentResources"
+    effect = "Allow"
+    principals {
+      identifiers = ["arn:aws:iam::${data.aws_caller_identity.current.account_id}:root"]
+      type        = "AWS"
+    }
+    actions = [
+      "kms:CreateGrant",
+      "kms:ListGrants",
+      "kms:RevokeGrant"
+    ]
+    resources = ["*"]
+    condition {
+      test     = "Bool"
+      values   = ["true"]
+      variable = "kms:GrantIsForAWSResource"
+    }
+  }
 }
 
 data "aws_iam_policy_document" "rds" {
@@ -265,6 +285,26 @@ data "aws_iam_policy_document" "rds" {
       variable = "kms:ViaService"
     }
   }
+
+  statement {
+    sid    = "AllowAttachmentOfPersistentResources"
+    effect = "Allow"
+    principals {
+      identifiers = ["arn:aws:iam::${data.aws_caller_identity.current.account_id}:root"]
+      type        = "AWS"
+    }
+    actions = [
+      "kms:CreateGrant",
+      "kms:ListGrants",
+      "kms:RevokeGrant"
+    ]
+    resources = ["*"]
+    condition {
+      test     = "Bool"
+      values   = ["true"]
+      variable = "kms:GrantIsForAWSResource"
+    }
+  }
 }
 
 data "aws_iam_role" "asg-service-linked-role" {