HPCC-30393 Add new event class and monitor audience

[ghalliday]

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[ghalliday]

@rpastrana I think this is the change you requested for #17839. I will merge both if you are happy.

[rpastrana]

@ghalliday this is fine

[rpastrana]

@ghalliday I just realized we report the available log Audience and Class enumerated values for UI consumption. Those values are listed in yet another file (not great, should be pulled from source instead), but this needs to be updated if we want the eclwatch log filter dialog to pre-populate the new values.

HPCC-Platform/helm/managed/logging/elastic/elastic4hpcclogs-hpcc-logaccess.yaml

Line 29 in d0b0b39

- code: OPR

HPCC-Platform/helm/examples/azure/log-analytics/loganalytics-hpcc-logaccess.yaml

Line 40 in d0b0b39

- code: OPR

[ghalliday]

@rpastrana updated those, and the documentation (but not the Portuguese!)

[rpastrana]

approved