Task/rename portfolio calculator no orders test to no activities (#7424)

Rename test

apps/api/src/app/portfolio/calculator/roai/portfolio-calculator-no-orders.spec.ts → apps/api/src/app/portfolio/calculator/roai/portfolio-calculator-no-activities.spec.ts

@@ -74,7 +74,7 @@ describe('PortfolioCalculator', () => {
   });
 
   describe('get current positions', () => {
-    it('with no orders', async () => {
+    it('with no activities', async () => {
       jest.useFakeTimers().setSystemTime(parseDate('2021-12-18').getTime());
 
       const portfolioCalculator = portfolioCalculatorFactory.createCalculator({