CAMEL-22925: Enhance S3 producer to stream the payload of type GenericFile

[bartoszpop]

Description

When moving a big file from SFTP to S3 in the streaming fashion we experience OutOfMemoryError. This is because org.apache.camel.component.aws2.s3.AWS2S3Producer#processSingleOp consumes a stream to determine the content length. However, for instances of org.apache.camel.component.file.remote.RemoteFile and in general org.apache.camel.component.file.GenericFile, the org.apache.camel.component.file.GenericFile#getFileLength method can be used for that purpose.

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[davsclaus]

This would be good to backport to 4.14.x so lets create a JIRA to have a record of this in the release notes