Deprecate component.Host.GetFactory

[TylerHelmuth]

Description

This PR deprecates the component.Host.GetFactory interface. This has the benefit of keeping the component.Host interface as simple as possible. Components that were relying on this method can instead check if the underlying component.Host implementation supports the interface. An example of this pattern can be found here:

opentelemetry-collector/extension/zpagesextension/zpagesextension.go

Lines 58 to 66 in 91f13c3

	hostZPages, ok := host.(interface {
	RegisterZPages(mux *http.ServeMux, pathPrefix string)
	})
	if ok {
	hostZPages.RegisterZPages(zPagesMux, "/debug")
	zpe.telemetry.Logger.Info("Registered Host's zPages")
	} else {
	zpe.telemetry.Logger.Warn("Host's zPages not available")
	}

Link to tracking issue

Related to #9511

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.37%. Comparing base (6171720) to head (e613f86).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10709      +/-   ##
==========================================
- Coverage   92.39%   92.37%   -0.02%     
==========================================
  Files         403      403              
  Lines       18739    18739              
==========================================
- Hits        17313    17311       -2     
- Misses       1066     1068       +2     
  Partials      360      360              

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[mx-psi]

Could we get a contrib PR doing explicit checking on component.Host to see if it implements this method?

[mx-psi]

Ah, that would be open-telemetry/opentelemetry-collector-contrib/pull/34234