[processorhelper] remove deprecated funcs

[codeboten]

No description provided.

[songy23]

Needs to fix a bunch of tests https://github.com/open-telemetry/opentelemetry-collector/actions/runs/10820820402/job/30021630065?pr=11151

[atoulme]

Please take a look at the CI:

# go.opentelemetry.io/collector/processor/processorhelper [go.opentelemetry.io/collector/processor/processorhelper.test]
Error: processorhelper\obsreport_test.go:40:10: obsrep.TracesInserted undefined (type *ObsReport has no field or method TracesInserted)
Error: processorhelper\obsreport_test.go:61:10: obsrep.MetricsInserted undefined (type *ObsReport has no field or method MetricsInserted)
Error: processorhelper\obsreport_test.go:104:10: obsrep.LogsInserted undefined (type *ObsReport has no field or method LogsInserted)
Error: processorhelper\obsreport_test.go:124:6: por.TracesInserted undefined (type *ObsReport has no field or method TracesInserted)
Error: processorhelper\obsreport_test.go:158:6: por.MetricsInserted undefined (type *ObsReport has no field or method MetricsInserted)
Error: processorhelper\obsreport_test.go:192:6: por.LogsInserted undefined (type *ObsReport has no field or method LogsInserted)
Error: processorhelper\obsreport_test.go:234:7: por.TracesInserted undefined (type *ObsReport has no field or method TracesInserted)
Error: processorhelper\obsreport_test.go:258:7: por.MetricsInserted undefined (type *ObsReport has no field or method MetricsInserted)
Error: processorhelper\obsreport_test.go:282:7: por.LogsInserted undefined (type *ObsReport has no field or method LogsInserted)

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 92.31%. Comparing base (0e22dc3) to head (d821cac).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
component/componenttest/obsreporttest.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11151      +/-   ##
==========================================
+ Coverage   92.26%   92.31%   +0.05%     
==========================================
  Files         414      413       -1     
  Lines       19802    19767      -35     
==========================================
- Hits        18270    18248      -22     
+ Misses       1160     1149      -11     
+ Partials      372      370       -2     

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