Use SDK for E2E tests

**Describe the bug**
When running the e2e test, the script uses `az` - the Azure CLI to clean up the resources. However, we can't expect all developers of `ng deploy` to have the Azure CLI installed. The cleanup should be done using the resources that are already available - the SDKs that are used in the project.

Error: `./scripts/test.sh: line 44: az.cmd: command not found`
**To Reproduce**
Steps to reproduce the behavior:
1. If you have Azure CLI, uninstall it. (Run `az` to see that it's not available)
2. Run `npm run test:e2e`
3. If the tests run as expected, after getting the link of the website, it crashes with the error message above.
4. Click on the link - it opens the website. Meaning the resources were not cleared.

**Expected behavior**
3 - the test script should not crash.
4 - the link should not be available.

Start with scripts/test.sh around line 44 and run npm run test:e2e without the Azure CLI installed. Trace the SDK resources already used by the project and replace the CLI-dependent cleanup path. Done means the end-to-end test completes without az.cmd and the deployed website link is no longer available afterward.

Written by the indexing model from the issue text.