test(document): Add test for direct share of document with custom ID

Author: arthurpitman

dynatrace/api/documents/directshares/testdata/terraform/example-custom-id.tf

@@ -0,0 +1,42 @@
+resource "dynatrace_iam_group" "this" {
+  name = "#name#"
+}
+
+resource "dynatrace_document" "this" {
+  custom_id = "#name#"
+  type      = "dashboard"
+  name      = "#name#"
+  content = jsonencode(
+    {
+      "version" : 1,
+      "variables" : [],
+      "tiles" : {
+        "0" : {
+          "type" : "markdown",
+          "title" : "",
+          "content" : "Dashboard content"
+        }
+      },
+      "layouts" : {
+        "0" : {
+          "x" : 0,
+          "y" : 0,
+          "w" : 24,
+          "h" : 14
+        }
+      }
+    }
+  )
+}
+
+resource "dynatrace_direct_shares" "this" {
+  document_id = dynatrace_document.this.id
+  access      = "read"
+
+  recipients {
+    recipient {
+      id   = dynatrace_iam_group.this.id
+      type = "group"
+    }
+  }
+}