Azure Pipelines Scaler: Improve error logging using poolID

[JorTurFer]

Proposal

Currently, in case of any error validating the poolID, the error is hidden:

body, err := getAzurePipelineRequest(ctx, url, metadata, httpClient)
	if err != nil {
		return -1, fmt.Errorf("agent pool with id `%s` not found", poolID)
	}

This makes impossible to troubleshoot the reason behind the fails, we should just return the original error

Use-Case

No response

Anything else?

No response

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.

[dttung2905]

Hello @JorTurFer, it should be a quick fix, I could help with this 🙏

[JorTurFer]

Thanks a lot!