Multiple errors for issue URL generation

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There are multiple places where we try to generate Issue URL using the helper project_issue_path or project_issue_url. This method will raise an error when a group level issue is passed.

We can easily fix these error by using GitLab's URL builder as in

Gitlab::UrlBuilder.build(issue) # Full URL

Gitlab::UrlBuilder.build(issue, only_path: true) # Path only

We can see a list of Sentry errors that I think might capture most of the occurrences