fix(cockpit/tem): base default project on config rather than naming

[estellesoulard]

#3950

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 25 lines in your changes missing coverage. Please review.
✅ Project coverage is 2.24%. Comparing base (b2c884e) to head (9a3750a).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
internal/services/cockpit/cockpit.go	0.00%	7 Missing ⚠️
internal/services/cockpit/alert_manager.go	0.00%	6 Missing ⚠️
internal/services/cockpit/cockpit_data_source.go	0.00%	3 Missing ⚠️
internal/services/cockpit/grafana_data_source.go	0.00%	3 Missing ⚠️
...ervices/cockpit/preconfigured_alert_data_source.go	0.00%	3 Missing ⚠️
...nal/services/tem/offer_subscription_data_source.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #3953   +/-   ##
=====================================
  Coverage   2.24%   2.24%           
=====================================
  Files        517     517           
  Lines      56206   56170   -36     
=====================================
  Hits        1260    1260           
+ Misses     54846   54810   -36     
  Partials     100     100           

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