Fix process metrics disable

[Dylan-M]

Description

Process registration protection for telemetry level being set to "None"

Link to tracking issue

Fixes #12098

Testing

Manual testing on an AIX 7.3 system rented from SiteOx:

-bash-5.2# ./otelcorecol_aix_ppc64 --config ./example.yaml 
2025-03-11T16:52:04.318-0500    info    [email protected]/service.go:193 Setting up own telemetry...
2025-03-11T16:52:04.318-0500    info    [email protected]/service.go:238 Skipped telemetry setup.
2025-03-11T16:52:04.318-0500    info    [email protected]/service.go:260 Starting otelcorecol... {"Version": "0.121.0-dev", "NumCPU": 8}
2025-03-11T16:52:04.319-0500    info    extensions/extensions.go:40     Starting extensions...
2025-03-11T16:52:04.319-0500    info    [email protected]/service.go:283 Everything is ready. Begin running and processing data.
2025-03-11T16:52:13.786-0500  info    [email protected]/collector.go:342       Received signal from OS {"signal": "interrupt"}
2025-03-11T16:52:13.786-0500    info    [email protected]/service.go:325 Starting shutdown...
2025-03-11T16:52:13.786-0500    info    extensions/extensions.go:68     Stopping extensions...
2025-03-11T16:52:13.786-0500    info    [email protected]/service.go:339 Shutdown complete.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 92.09%. Comparing base (d3c5895) to head (c6c7096).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
service/service.go	50.00%	2 Missing and 1 partial ⚠️

❌ Your patch status has failed because the patch coverage (50.00%) 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   #12615      +/-   ##
==========================================
- Coverage   92.16%   92.09%   -0.07%     
==========================================
  Files         471      473       +2     
  Lines       25561    25592      +31     
==========================================
+ Hits        23558    23569      +11     
- Misses       1591     1612      +21     
+ Partials      412      411       -1     

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[mx-psi]

cc @codeboten

[mdirkse]

Thanks! You just seriously simplified my upgrade process ;)

[Dylan-M]

Thanks! You just seriously simplified my upgrade process ;)

I'm still working on updating gopsutil so that we don't need to disable the internal metrics on AIX and other systems. It has ended up being a larger project than I expected because my AI code assistant is useless for AIX. It generates code that looks good, but is a pure hallucination.