[receiver/mongodbatlasreceiver] Add Log collection

[armstrmi]

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Description: <Describe what has changed.>

• Added functionality for a logs receiver to collect logs from project clusters specified by the user.
• Along with cluster logs, audit logs from those clusters are also scraped.
• New Log and Audit log structures added in to the internal package logs.go
• Log conversion from new custom log structures into plog.Logs

Link to tracking Issue: <Issue number if applicable> https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/12347

Testing:

• Tested changes against a live system and was able to successfully retrieve mongo and audit logs
• New Unit tests added to config.go_test, receiver_test.go,
• New Test Files added mongodb_event_to_logdata_test.go, logs_test.go

Documentation:

• Added changes to the local README to correlate with the updated configuration.

[StefanKurek]

@armstrmi once you fix the failures, I think it's looking pretty good for an actual PR

[armstrmi]

@djaglowski Thanks for the informative feedback