Move service/builder to internal, no need to expose public

[bogdandrutu]

Followup after #2624

Signed-off-by: Bogdan Drutu [email protected]

[codecov]

Codecov Report

Merging #2625 (7e74f05) into main (d9099c5) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2625   +/-   ##
=======================================
  Coverage   92.02%   92.02%           
=======================================
  Files         274      274           
  Lines       15455    15455           
=======================================
  Hits        14222    14222           
  Misses        850      850           
  Partials      383      383           

Impacted Files	Coverage Δ
service/internal/builder/builder.go	100.00% <ø> (ø)
service/internal/builder/exporters_builder.go	81.73% <ø> (ø)
service/internal/builder/extensions_builder.go	80.76% <ø> (ø)
service/internal/builder/pipelines_builder.go	88.42% <ø> (ø)
service/internal/builder/receivers_builder.go	72.13% <ø> (ø)
service/service.go	52.67% <ø> (ø)

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