IssuesList changes

[MarceloRobert]

Backend (#869):

• Add specific endpoint to find issues for build/boots/tests of a specific tree
• Change query to return the start_date of the first version of the list of issues
• Change query to return the trees where this issue appears

Frontend changes (after backend, #870):

• Span through the entire page (2 Columns)
• Show creation date of the first version of issues (as a pill)
• Show indicators for if the issue appears on specific trees (as pills)
  • for mainline, stable, linux-next
• Change "Unknown" issues to "Uncategorized results"
• Change issue_id and issue_comment on issueDetails page (from title to field and vice-versa)

[MarceloRobert]

Closed from subissues #869 #870 and #925