WPB-23942 prevent rabbit mq queues creation for client notifications

[battermann]

https://wearezeta.atlassian.net/browse/WPB-23942

Checklist

• Add a new entry in an appropriate subdirectory of changelog.d
• Read and follow the PR guidelines

[Copilot]

Pull request overview

This PR makes “consumable notifications” (RabbitMQ-backed client notifications) configurable and disables the RabbitMQ queue setup/publishing paths by default, to prevent unintended queue creation for client notifications.

Changes:

• Add a new consumableNotifications boolean setting to Brig and Gundeck configs and propagate it via Helm/integration YAML.
• Gate RabbitMQ queue setup for consumable-notification clients (Brig + Gundeck internal endpoint) and gate RabbitMQ routing in Gundeck push processing.
• Update integration tests to explicitly enable consumable notifications when exercising that functionality.

Reviewed changes

Copilot reviewed 15 out of 16 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
services/gundeck/test/unit/MockGundeck.hs	Implements new MonadPushAll capability flag in the mock.
services/gundeck/src/Gundeck/Push.hs	Adds mpaConsumableNotificationsEnabled and gates RabbitMQ split/routing.
services/gundeck/src/Gundeck/Options.hs	Adds settings.consumableNotifications to Gundeck settings schema.
services/gundeck/src/Gundeck/API/Internal.hs	Prevents queue setup calls when consumable notifications are disabled.
services/gundeck/gundeck.integration.yaml	Sets settings.consumableNotifications: false for integration config.
services/brig/src/Brig/Options.hs	Adds optSettings.setConsumableNotifications to Brig settings schema.
services/brig/src/Brig/API/Client.hs	Gates setupConsumableNotifications on the new Brig setting.
services/brig/brig.integration.yaml	Sets optSettings.setConsumableNotifications: false for integration config.
integration/test/Test/Events.hs	Enables consumable notifications via overrides in tests that depend on it.
hack/helm_vars/wire-server/values.yaml.gotmpl	Introduces CI helm values knob consumableNotifications: false.
hack/bin/helm-render-ci-values.sh	Adds helper script to render CI values via helmfile.
charts/wire-server/values.yaml	Adds top-level Helm value consumableNotifications: false.
charts/wire-server/templates/gundeck/configmap.yaml	Wires Helm value into Gundeck settings.consumableNotifications.
charts/wire-server/templates/brig/configmap.yaml	Wires Helm value into Brig optSettings.setConsumableNotifications.
changelog.d/5-internal/WPB-23942	Adds changelog entry for configurability/default disable.
Makefile	Adds render-ci-manifest target to render CI manifest from rendered values.

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[Copilot]

Pull request overview

Copilot reviewed 17 out of 18 changed files in this pull request and generated 2 comments.

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[supersven]

Overall, this is looking great 👍

Please consider my mktemp comments as optional improvements.

We should be certain about the future structure of the one-for-all Helm values though, as that might be hard to change later ("hard" as in "we would have to guide customers through this" 😉 ).

I'm approving anyways, because you will surely take care of this.