#### Description
At the moment, `receiver`, `scraper`, `processor`, `exporter`, and
`extension` each have their own version of the `MakeFactoryMap`
function, which takes a list of Factories and returns it as a map, with
the component name as the key (and an error if there is overlap).
Because all versions are near-identical except for the Factory type
used, and this function is only used in tests and in the code generated
by OCB (`components.go`), it was suggested to make it generic and move
it to the `otelcol` package.
This PR does exactly that. The old `MakeFactoryMap` functions are
deprecated (and may be removed alongside their tests in a future
release). I also had to make a few other odd changes to fit the new
dependency graph.
#### Link to tracking issue
Resolves#12222
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Co-authored-by: Alex Boten <223565+codeboten@users.noreply.github.com>
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description
This moves the connector builder out of the `connector` package, and
into `service/internal/builders`.
There's no real reason for this struct to be public (folks shouldn't
call it), and making it private will allow us to add profiling support
to it.
<!-- Issue number if applicable -->
#### Link to tracking issue
https://github.com/open-telemetry/opentelemetry-collector/pull/10375#pullrequestreview-2144929463
While this is not technically required for the profiles work (there is
no notion of signals in extensions), this PR is here to keep things
consistent.
Jade Guiton
Bogdan Drutu
Damien Mathieu