Fetch project issue types in bulk

[grahamalama]

The Get projects paginated REST API endpoint allows clients to fetch metadata about multiple projects in one call. One of the returned fields for each project is issue type.

Currently, we iterate over every action and fetch data about the Jira project, including issue type. We might instead use this endpoint to get issue types in bulk. This would result in fewer HTTP requests in the heartbeat.

[grahamalama]

Close via #791