chore: Add config option for team broker hostname

[hardillb]

Description

Allow team broker hostname to be set in the flowforge.yml

Defaults to broker.[forge.domain]

(Also set EMQX config option)

Related Issue(s)

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production (NA as default matches)

Labels

• Includes a DB migration? -> add the area:migration label

[ppawlowski]

Since it's a team broker, I believe we should continue the transition we started when the feature was introduced and add a new config under broker object instead of forge.broker.teamBroker.

[hardillb]

But we already have forge.broker.hostname which would be confusing

[ppawlowski]

Right, but with this change we will end up with team broker configuration scattered in two places which will also introduce confusion.
From my perspective previous approach was clear - team broker values defined in broker object, old broker values defined in forge.broker object.

[hardillb]

ahh, sorry I miss understood.

[hardillb]

Have a look now

[ppawlowski]

Looks good. Feel free to merge when suitable.