Fixes the issue where Jest tester with useSourceFiles: true crashes with Cannot read properties of undefined (reading 'toArray') during bit test.

Problem

When Jest tester is configured with useSourceFiles: true, it expects context.sourcePatterns to be available. However, during bit test, the tester context only included patterns but not sourcePatterns, causing an undefined error. The sourcePatterns was only being populated during bit build task by the tester-task component.

Solution

Initialize sourcePatterns in the tester service to default to the same value as patterns. This ensures:

• During bit test: sourcePatterns equals patterns, allowing jest-tester to work correctly with source files
• During bit build: The jest-tester-task can still override sourcePatterns with capsule-specific paths