test_scanjob_with_multiple_sources: test multiple source *types* again

[mirekdlugosz]

Since the very beginning, the point of the test was to run a scan that has different source types. I haven't noticed that and broke the test in 78ac64636584854811e394947177035cdf91f887 (#412) - when test was ported to data_provider and looked for a scan that has multiple sources in the config. In our default config, there's only one scan like that, and it uses multiple sources of the same type - network.

With that change, it ensures that scan will have two sources of different types.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 78.48%. Comparing base (2a21c4b) to head (81649d2).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #528 +/- ## ======================================= Coverage 78.48% 78.48% ======================================= Files 7 7 Lines 688 688 ======================================= Hits 540 540 Misses 148 148 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.