runtime: add ns unit to deprecated runtime metrics

[Machyne]

Add missing ns units to the process.runtime.go.gc.pause_total_ns and process.runtime.go.gc.pause_ns metrics.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: pellared / name: Robert Pająk (6bb8572, db34d14, 4b6651b)
• ✅ login: Machyne / name: Matt Cotter (9c4b328)

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 81.5%. Comparing base (ad44bed) to head (4b6651b).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...tion/runtime/internal/deprecatedruntime/runtime.go	0.0%	2 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #7490   +/-   ##
=====================================
  Coverage   81.5%   81.5%           
=====================================
  Files        198     198           
  Lines      17963   17963           
=====================================
  Hits       14647   14647           
  Misses      2917    2917           
  Partials     399     399           

Files with missing lines	Coverage Δ
...tion/runtime/internal/deprecatedruntime/runtime.go	0.0% <0.0%> (ø)

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[dashpole]

Looks like this needs an entry in CHANGELOG.md and you need to sign the CLA.

[Machyne]

Looks like this needs an entry in CHANGELOG.md and you need to sign the CLA.

Done and done! I thought I had the CLA sorted in advance, sorry about that. All good now though.