Add more tags to open telemetry failure counter

[neha-bhargava]

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Updates to Otel failure counter

1. Add sub error code: Investigate the change in cardinality with this change
2. Add Managed identity source to understand the source of errors

[TimHannMSFT]

How are we ensuring the cardinality of these tags remains manageable? Is there somewhere to read more about the potential values? Who controls the inputs here is it Entra, a user, something else?

[neha-bhargava]

For the managed identity, we have 5 sources. But the logs generated for a client id that we collect from a machine will have a single managed identity source (app service, vm or azure arc etc). So this will add another data point but the number of records should remain the same. Worst case would be times 5 but I don't think that would be the case.

I will need to find more details on the sub error codes. Will update here once I have it.