Add 3.5.0 and 3.4.1 to system tests

[mimaison]

Committer Checklist (excluded from commit message)

• Verify design and implementation
• Verify test coverage and CI build status
• Verify documentation (including upgrade notes)

[showuon]

Thanks for helping adding 3.4.1. :)

[mimaison]

@mjsax @vvcephei Can you upload the 3.5.0 artifacts to the Confluent S3 bucket as per the release instructions? And verify the 3.4.1 artifacts are there too

[mimaison]

I still don't see the packages in the S3 bucket, so re-pinging @mjsax @vvcephei

[mjsax]

Sorry for the delay. Uploaded. Can you verify?

[mimaison]

Thanks @mjsax, I can now see 3.5.0 and 3.4.1 in https://s3-us-west-2.amazonaws.com/kafka-packages