[permissions V2] Create and update a custom role (without granularity) (#11003)

First steps for https://github.com/twentyhq/core-team-issues/issues/595
and https://github.com/twentyhq/core-team-issues/issues/621

Not handling granular permissions through objectPermissions and
settingsPermissions next; will come next !

packages/twenty-server/src/engine/metadata-modules/utils/is-arg-defined-if-provided-or-throw.util.ts

@@ -0,0 +1,15 @@
+import { isDefined } from 'twenty-shared';
+
+export const isArgDefinedIfProvidedOrThrow = ({
+  input,
+  key,
+  value,
+}: {
+  input: object;
+  key: string;
+  value: any;
+}) => {
+  if (key in input && !isDefined(value)) {
+    throw new Error(`${key} must be defined when provided`);
+  }
+};