replace report_issue and resolve_issue endpoints with new "issue_handling" endpoint

[Abh1ramManugur1]

Fixes #413.

Description of the Change

functionality unchanged, endpoint logic condensed into single view function

Checklist

Please check all that apply to your proposed changes

• HTML code change
• Added package dependency
• Added data
• Changed django model
• Documentation change
• Added or changed TaskRunner

Additional context

[manning-ncsa]

@Abh1ramManugur1 a few points:

• Did you interactively test this version on a result page?
• Also, did you run the unit tests (i.e. bash run/blastctl ci up)?
• Please update the Changelog with a line describing the changes. Don't worry about changing the version number yet. We should probably consolidate these API changes into a single 2.0.0 release.