Add full component graph build

[djaglowski]

This PR contains the bulk of what remains of #6700

It is a large PR, but mostly because of tests.

I'm presenting this as an alternative to the incremental top-down approach described in #7023. The main benefit of this would be to prevent a temporary lapse in test coverage.

[codecov]

Codecov Report

Base: 89.40% // Head: 90.58% // Increases project coverage by +1.18% 🎉

Coverage data is based on head (63976de) compared to base (84c3d00).
Patch coverage: 99.21% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7045      +/-   ##
==========================================
+ Coverage   89.40%   90.58%   +1.18%     
==========================================
  Files         293      293              
  Lines       13999    14240     +241     
==========================================
+ Hits        12516    12900     +384     
+ Misses       1215     1072     -143     
  Partials      268      268              

Impacted Files	Coverage Δ
service/pipelines.go	93.66% <91.30%> (-0.28%)	⬇️
connector/connector.go	99.59% <100.00%> (+<0.01%)	⬆️
service/graph.go	98.95% <100.00%> (+27.52%)	⬆️
...rvice/internal/testcomponents/example_processor.go	100.00% <100.00%> (ø)
service/nodes.go	100.00% <100.00%> (+95.50%)	⬆️
...ervice/internal/proctelemetry/process_telemetry.go	82.53% <0.00%> (+10.74%)	⬆️
service/internal/components/loggers.go	100.00% <0.00%> (+24.00%)	⬆️
...rvice/internal/testcomponents/example_connector.go	100.00% <0.00%> (+100.00%)	⬆️

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[bogdandrutu]

I forgot to press submit review, I am sorry

[djaglowski]

I think I've addressed all feedback. Most items were addressed in separate commits for the sake of readability. I can squash when you think it's ready.