Add 3rd Party broker endpoint

[hardillb]

Description

• GET /api/v1/teams/:teamId/brokers/:brokerId

returns a broker object (with no credentials) and a extra status field that shows if the client is connected to the broker

This is to be used to add a status pill to 3rd party brokers

Also fix the schema for the broker apis and fixes the db.views.BrokerCredentials functons

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

Labels

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

[codecov]

Codecov Report

Attention: Patch coverage is 60.86957% with 9 lines in your changes missing coverage. Please review.

Project coverage is 78.36%. Comparing base (bafc741) to head (a215e0f).
Report is 15 commits behind head on mqtt-topic-schema-storge.

Files with missing lines	Patch %	Lines
forge/ee/routes/teamBroker/3rdPartyBroker.js	10.00%	9 Missing ⚠️

Additional details and impacted files

@@                     Coverage Diff                      @@
##           mqtt-topic-schema-storge    #5081      +/-   ##
============================================================
- Coverage                     78.49%   78.36%   -0.13%     
============================================================
  Files                           337      337              
  Lines                         15772    15829      +57     
  Branches                       3634     3654      +20     
============================================================
+ Hits                          12380    12405      +25     
- Misses                         3392     3424      +32     

Flag	Coverage Δ
backend	78.36% <60.86%> (-0.13%)	⬇️

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[knolleary]

Fixing up linting

[knolleary]

Approved pending changes:

• Fixed up an erorr message typo.
• Renamed 3rdPartyBroker to MQTTBroker in the schema as it feels cleaner.

[hardillb]

Test failure is in device groups so merging anyway.

Can review tests in lower branch before merging to main