fix(client-s3): skip jest testing

mocha is used for testing in client-s3 #1455
The CI is failing when we try to use jest #2163

Author: trivikr

clients/client-s3/jest.config.js

@@ -1,4 +1,4 @@
 module.exports = {
   preset: "ts-jest",
-  testMatch: ["**/*.spec.ts", "!**/*.browser.spec.ts", "!**/*.integ.spec.ts"],
+  testMatch: ["!**/*.spec.ts", "!**/*.browser.spec.ts", "!**/*.integ.spec.ts"],
 };