feat: Safer Yaml openning

[KSkwarczynski]

Pull request description

Introduce new wrapper around YAML::LoadFile, whole implementation is being handled by yaml, but by having wrapper we can easily intorudce additional checks and in case of error we can pass file, line which should make debugging much easier

Changes or fixes

• test_stat is no longer member of manager. For example we use manager for samplePDF cofnig. In this case test_stat make no sense. Now we have simply getter so all code should work fine

Examples

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Memory and CPU Usage Summary

### Memory and CPU Usage Summary

| Metric  |     Mean    |      Max    |
|---------|-------------|-------------|
| **RAM** |   312.73 MB |   317.02 MB |
| **CPU** |    92.85 %  |   128.25 %  |

Memory Usage Plot

• Job Summary Link

You can view the memory usage plot directly in the job summary from the link above.

[dbarrow257]

LGTM