fix(servicecatalog): incorrect service in portfolio arn generation (#21770)

Portfolio construct code uses the incorrect service name when generating the ARN for the portfolio. The ARN generated uses the service name "servicecatalog" instead of "catalog". CLI documentation confirms ARN should use catalog instead of servicecatalog: https://docs.aws.amazon.com/cli/latest/reference/servicecatalog/create-portfolio.html

Added a single unit test to check arn formatting.

fixes #20849
----

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Author: edyl-berkeley

Diff for: packages/@aws-cdk/aws-servicecatalog/lib/portfolio.ts

@@ -329,7 +329,7 @@ export class Portfolio extends PortfolioBase {
     });
     this.portfolioId = this.portfolio.ref;
     this.portfolioArn = cdk.Stack.of(this).formatArn({
-      service: 'servicecatalog',
+      service: 'catalog',
       resource: 'portfolio',
       resourceName: this.portfolioId,
     });

Diff for: packages/@aws-cdk/aws-servicecatalog/test/portfolio.test.ts

@@ -62,6 +62,14 @@ describe('Portfolio', () => {
       }).toThrowError(/Missing required Portfolio ID from Portfolio ARN/);
     }),
 
+    test('portfolio arn formatting', () => {
+      const portfolio = new servicecatalog.Portfolio(stack, 'Portfolio', {
+        displayName: 'MyPortfolio',
+        providerName: 'testProvider',
+      });
+      expect(portfolio.portfolioArn).toEqual(`arn:${stack.partition}:catalog:${stack.region}:${stack.account}:portfolio/${portfolio.portfolioId}`);
+    }),
+
     test('fails portfolio creation with short name', () => {
       expect(() => {
         new servicecatalog.Portfolio(stack, 'MyPortfolio', {