fix: the tsconfig spec generated for library contains several issues #2481

Align with application generation and reuse angular tsconfig.spec.json

Author: cpaulve-1A

packages/@o3r/workspace/schematics/index.it.spec.ts

@@ -115,6 +115,7 @@ describe('new otter workspace', () => {
     expect(existsSync(path.join(workspacePath, 'project'))).toBe(false);
     generatedLibFiles.forEach((file) => expect(existsSync(path.join(inLibraryPath, file))).toBe(true));
     expect(() => packageManagerRunOnProject(libName, true, { script: 'build' }, execAppOptions)).not.toThrow();
+    expect(() => packageManagerRunOnProject(libName, true, { script: 'test' }, execAppOptions)).not.toThrow();
   });
 
   test('should generate a monorepo setup', async () => {