[E2E] PROMOTE TO BLOCKING: upload_new_file_in_web_ide_spec.rb

What does this MR do?

Promotes the following e2e tests to the blocking bucket:

1. Create Upload a file in Web IDE when the file is an image behaves like upload a file verifies it successfully uploads and commits to a MR | Testcase | Spec metrics

2. Create Upload a file in Web IDE when a file with the same name already exists throws an error | Testcase | Spec metrics

This MR was created based on data from reliable e2e test report: #471185 (closed)

(This MR was automatically generated by gitlab_quality-test_tooling at 2024-07-08 02:05:27 UTC)