[TASK] Support config override in Console

[aabouzaid]

Related to

Epic: https://github.com/camunda/distribution/issues/325

Overview

Add a new key for Console in the Alpha chart named console.overrideConfiguration, which works like console.configuration but writes the content to a new file called application-override.yaml (in the same dir of application.yaml).

There is no need for a merge mechanism in the Helm chart; that's done by the app, which merges the content of application-override.yaml to override application.yaml.

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1. feat: adding application override to console #2594
   component/console kind/enhancement +2