Add support for MSK IAM authentication

[bpalermo]

Is your feature request related to a problem? Please describe.
Currently Kafka receiver and exporter don't support IAM authentication for AWS MSK.

Describe the solution you'd like
Add support for IAM authentication using, https://github.com/aws/aws-msk-iam-sasl-signer-go, since it should be supported by Sarama.

Describe alternatives you've considered
None

Additional context

[github-actions]

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[mechastorm]

It seems it is supported in the Contrib collector but I haven't validated yet - https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/de3cc54e9210e10c5ad9f60c7baf9f73cc3af2bf/receiver/kafkareceiver/README.md?plain=1#L53

So I guess we just need this promoted to the core collector?

[bpalermo]

So I guess we just need this promoted to the core collector?

Unfortunately it doesn't work, at least last time i tried a couple of months ago.