Log when analysers fail to match any outcome conditions

[banjoh]

Describe the rationale for the suggested feature.

If a given list of analysers fails to match in any of the outcome conditions, no result is recorded. Debugging becomes difficult since running preflight with -v flags or --debug, we cannot tell why the analyser was ignored

Example spec

apiVersion: troubleshoot.sh/v1beta2
kind: HostPreflight
metadata:
  name: kurl-builtin
spec:
  collectors:
    - hostOS: {}
  analyzers:
    - hostOS:
        outcomes:
          - pass:
              when: "centos = 7"
              message: "containerd addon supports centos 7"

Sample run

[evans] $ sudo preflight spec.yaml -v=2 --interactive=false
I0819 18:25:02.844416   40332 loader.go:260] Loaded troubleshoot specs successfully
[Host OS Info] Running collector...

============ Collectors summary =============
Succeeded (S), eXcluded (X), Failed (F)
=============================================
Host OS Info (S) : 23ms

============ Redactors summary =============
No redactors executed

============= Analyzers summary =============
Succeeded (S), eXcluded (X), Failed (F)
=============================================
Host OS Info (S) : 0ms

Duration: 25ms
Error: completed with no analysis results

Describe the feature

Add a log line stating that the analysis did not match any analyser outcomes