Generate a real NotFoundRepoGroup

This won't have an `id` field. We initially generated this the same
way we did for all other skipped repos, but this one is special because
it's only providing the fullName field, while the others also provide
`id` and `private`.

extensions/ql-vscode/src/vscode-tests/factories/remote-queries/shared/skipped-repositories.ts

@@ -8,7 +8,7 @@ export function createMockSkippedRepos(): VariantAnalysisSkippedRepositories {
   return {
     accessMismatchRepos: createMockSkippedRepoGroup(),
     noCodeqlDbRepos: createMockSkippedRepoGroup(),
-    notFoundRepos: createMockSkippedRepoGroup(),
+    notFoundRepos: createMockNotFoundRepoGroup(),
     overLimitRepos: createMockSkippedRepoGroup()
   };
 }
@@ -28,3 +28,17 @@ export function createMockSkippedRepoGroup(): VariantAnalysisSkippedRepositoryGr
     ]
   };
 }
+
+export function createMockNotFoundRepoGroup(): VariantAnalysisSkippedRepositoryGroup {
+  return {
+    repositoryCount: 2,
+    repositories: [
+      {
+        fullName: 'github/' + faker.random.word(),
+      },
+      {
+        fullName: 'github/' + faker.random.word(),
+      }
+    ]
+  };
+}