test: remove test files from coverage collection

packages/system-api/jest.config.cjs

@@ -7,7 +7,7 @@ module.exports = {
   setupFiles: ['<rootDir>/src/test/dotenv-config.ts'],
   setupFilesAfterEnv: ['<rootDir>/src/test/jest-setup.ts'],
   collectCoverage: true,
-  collectCoverageFrom: ['src/**/*.{ts,tsx}', '!src/**/migrations/**/*.{ts,tsx}', '!**/config/**/*.{ts,tsx}'],
+  collectCoverageFrom: ['src/**/*.{ts,tsx}', '!src/**/migrations/**/*.{ts,tsx}', '!**/config/**/*.{ts,tsx}', '!**/__tests__/**'],
   passWithNoTests: true,
   transform: {
     '^.+\\.graphql$': 'graphql-import-node/jest',