[PWGLF] Add OO cascade-enriched ini file

[ddobrigk]

Leverages existing extra-strangeness code and just switches the cfg file to the common OO one. Tagging @romainschotter @ercolessi

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[ddobrigk]

This is now ready to go I've additionally:

• added a test script (mandatory to pass the CI)
• changed the enrichment scheme that was 5x above normal Xi/Pi and Omega/Pi such that now it's 5x for Xi/Pi but 30x for Omega/Pi (which is fine since Omega is rarer and the bias in Nch is proportionally smaller, and thus enriching with more omegas is significantly better). With a 30x improvement over native ratio, an OO MC with a MC/data sampling of 5%, which is feasible, produces plenty of Omega for a proper efficiency estimation.