[receiver/awsfirehosereceiver] Support logs from AWS services sent directly to Firehose

[kaiyan-sheng]

Component(s)

receiver/awsfirehose

Is your feature request related to a problem? Please describe.

The current AWS Firehose receiver only supports cwlogs record type which is ingesting JSON format logs from CloudWatch. We should also add support for logs sent from services directly to Firehose. For example VPC flow logs can be sent directly to Firehose and our awsfirehosereceiver should be able to process these requests as well.

Describe the solution you'd like

We can introduce a new record_type: firehoselogs to separate the log type from record_type: cwlogs. Since there can be logs from different AWS services send directly to Firehose, the format will be different too. This record_type: firehoselogs will process the request, store the whole record data into message field, store the timestamp and firehose ARN.

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners:

• receiver/awsfirehose: @Aneurysm9

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