Set Balena device and/or fleet configs programmatically.

[nicomiguelino]

General

• ~This issue aims to automate the modification of relevant config params relevant to #1651.~

Tasks

• [x] Modify relevant GitHub workflow files so that fleet-wide configs can be set programmatically.

Strategy

• Make use of balena-io-experimental/community-cli-action to ensure that fleet configs are properly set.