Add support for deprecated component type aliases

[dmitryax]

Related to #14208

This change allows component authors to register one optional deprecated alias per component type, enabling smooth migrations when renaming components. When an alias is used in configuration, the collector will automatically resolve it to the original component and log a deprecation warning.

Changes:

• Add WithDeprecatedTypeAlias factory option to experimental modules (xreceiver, xexporter, xprocessor, xconnector)
• Generate alias expansion code in builder template that:
  • Populates factory maps with aliases pointing to original factories
  • Updates module information maps for aliased types
  • Validates that aliases don't conflict with existing component types
• Add deprecation warnings that log when an alias is used: "Using deprecated alias ; use instead"

Extensions are left aside for now.

[codecov]

Codecov Report

❌ Patch coverage is 91.94631% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.20%. Comparing base (20802fb) to head (fcbda4d).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
connector/connector.go	36.84%	6 Missing and 6 partials ⚠️

❌ Your patch status has failed because the patch coverage (91.94%) is below the target coverage (95.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14349      +/-   ##
==========================================
+ Coverage   92.19%   92.20%   +0.01%     
==========================================
  Files         669      670       +1     
  Lines       41383    41472      +89     
==========================================
+ Hits        38152    38239      +87     
- Misses       2194     2195       +1     
- Partials     1037     1038       +1     

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[codspeed-hq]

Merging this PR will not alter performance

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

Summary

✅ 62 untouched benchmarks
⏩ 20 skipped benchmarks¹

---

_{Comparing dmitryax:component-aliases (fcbda4d) with main (20802fb)}

Footnotes

1. 20 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[osullivandonal]

2026-01-07T09:30:04.939Z	warn	builders/builders.go:40	"olddebug" alias is deprecated; use "debug" instead	{"resource": {"service.instance.id": "0868e402-b25d-4acf-a11d-ecbe8a431bac", "service.name": "otelcorecol", "service.version": "0.143.0-dev"}, "otelcol.component.id": "olddebug", "otelcol.component.kind": "exporter", "otelcol.signal": "logs"}

Verified locally 🚀