Finalise report by improving readability and presentation

LSWA final report is close to being submittable. We could improve further:

• Make the report more readable to an audience outside WiredTiger
• Add some visual representations of the raw data, again to add readability
• Get another round of review done from Alex G and Keith Smith, address comments. Get LGTM
• Optionally get a round of review done from newer team members to help with readability from a higher level.
• Possibly address comments and queries from readers outside the team.