QA-435: cleanup output

[dothebart]

Scope & Purpose

Improve output to be harmonized and have consistent look & feel across all suites.

• Make printing of delta-Ts optional.

• enforce gauge-name in progress

• add current file numbers to all outputs

• [x] :hammer: Refactoring/simplification

Checklist

• [x] sidelining PRs
  • [x] ArangoDB Pullrequest
  • [x] RTA Pullrequest