Add a team selection step when deploying blueprints

[cstns]

Description

Add a team selection step when deploying blueprints.

• the team step should only be accessible when deploying blueprints and the user is a member in multiple teams

Related Issue(s)

closes #6098

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
• Link to Changelog Entry PR, or note why one is not needed.
  -bugfix, not needed

Labels

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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.81%. Comparing base (a03f01a) to head (5f27d2f).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6099   +/-   ##
=======================================
  Coverage   76.81%   76.81%           
=======================================
  Files         380      380           
  Lines       19230    19230           
  Branches     4624     4624           
=======================================
  Hits        14771    14771           
  Misses       4459     4459           

Flag	Coverage Δ
backend	76.81% <ø> (ø)

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[knolleary]

Verified with both a user with multiple teams (they are shown the choice of teams) and a user with a single team (they are not shown the choice).

[knolleary]

@cstns my apologies - not sure why I didn't merge it after approval - think I was waiting for the tests to pass but failed to come back.

[cstns]

No worries!