Updating gsql_client version to 3.4.0

[kapilsaini]

Upgrading default GSQL client version to 3.4.0

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[jmeekhof]

@kapilsaini Can you sign the contributor license agreement?

[jmeekhof]

Can you remove the changes to the docs. The release task handles updating the documentation when appropriate.

Really the only change necessary is in the Configurations.kt file. The rest of the changes should be left out.