Escalate various log messages

[jkowalleck]

If result validation was explicitly requested but skipped, then show a warning
fixes #1137

some log messages were raised to be warnings, in case they lead to an error.

some wordings were changed

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -0.40%	❌ 72.22% (target: 80.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (cd1d3c6)	1155	987	85.45%
Head commit (a9e27c1)	1164 (+9)	990 (+3)	85.05% (-0.40%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1138)	18	13	72.22%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

See your quality gate settings    Change summary preferences

_{You may notice some variations in coverage metrics with the latest Coverage engine update. For more details, visit the documentation}