Use logtest.AssertRecordEqual in otellogrus test

[MrAlias]

Originally posted by @pellared in #5847 (comment)

[MrAlias]

This is not immediately resolvable. There is an impedance mismatch.

AssertRecordEqual accepts log.Records. But the recorder used in the mentioned test produces logtest.EmittedRecords. An AssertEmittedRecordEqual should be added or the EmittedRecord return for a recorder needs to be reconsidered in logtest.

cc @dmathieu

[dmathieu]

I solved that problem in #5852 by using j.Record, which is made available by EmittedRecord.

[dmathieu]

the EmittedRecord return for a recorder needs to be reconsidered in logtest.

We need EmittedRecord if we want to keep storing the context.

An AssertEmittedRecordEqual should be added

That assertion would probably have to check for the context as well, which we wouldn't want to do in the logrus bridge anyway.