[CLI] Retry if upload fails

Hi, Time to time we get 503 errors while uploading the data. The log looks like this:

...
[2023-02-24T17:38:21.359Z] ['verbose'] tag
[2023-02-24T17:38:21.359Z] ['verbose'] flags
[2023-02-24T17:38:21.359Z] ['verbose'] parent
[2023-02-24T17:38:21.360Z] ['info'] Pinging Codecov: https://codecov.io/upload/v4?package=github-action-2.1.0-uploader-0.3.5&token=*******....
[2023-02-24T17:38:21.360Z] ['verbose'] Passed token was 36 characters long
[2023-02-24T17:38:21.360Z] ['verbose'] https://codecov.io/upload/v4?package=github-action-2.1.0-uploader-0.3.5&...
        Content-Type: 'text/plain'
        Content-Encoding: 'gzip'
        X-Reduced-Redundancy: 'false'
[2023-02-24T17:38:23.332Z] ['error'] There was an error running the uploader: Error uploading to [https://codecov.io:](https://codecov.io/) Error: There was an error fetching the storage URL during POST: 503 - upstream connect error or disconnect/reset before headers. reset reason: connection failure
[2023-02-24T17:38:23.332Z] ['verbose'] The error stack is: Error: Error uploading to [https://codecov.io:](https://codecov.io/) Error: There was an error fetching the storage URL during POST: 503 - upstream connect error or disconnect/reset before headers. reset reason: connection failure
    at main (/snapshot/repo/dist/src/index.js)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
[2023-02-24T17:38:23.332Z] ['verbose'] End of uploader: 3001 milliseconds

It would be great to have a retry mechanism with some defined timeout.

Start from the uploader entry point shown in the report, dist/src/index.js, and trace the POST that fetches the storage URL. Define the retry timeout and retry conditions for 503 upload failures, then verify that transient failures are retried and persistent failures still produce the existing error.