[Resources.ProcessRuntime] Rename processruntime detector namespace

[matt-hensley]

Changes

Changes are following guidelines in #1610.

• Renames OpenTelemetry.ResourceDetectors.ProcessRuntime to OpenTelemetry.Resources.ProcessRuntime
• Makes detector internal
• Adds AddProcessRuntimeDetector extension method for ResourceBuilder

For significant contributions please make sure you have completed the following items:

• Appropriate CHANGELOG.md updated for non-trivial changes
• Design discussion issue #
• Changes in public API reviewed

[codecov]

Codecov Report

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

Project coverage is 73.78%. Comparing base (71655ce) to head (d20aa5a).
Report is 248 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1767      +/-   ##
==========================================
- Coverage   73.91%   73.78%   -0.14%     
==========================================
  Files         267      293      +26     
  Lines        9615    10859    +1244     
==========================================
+ Hits         7107     8012     +905     
- Misses       2508     2847     +339     

Flag	Coverage Δ
unittests-Exporter.Geneva	61.18% <ø> (?)
unittests-Exporter.OneCollector	89.72% <ø> (?)
unittests-Extensions	79.33% <ø> (?)
unittests-Instrumentation.AspNet	74.39% <ø> (?)
unittests-Instrumentation.AspNetCore	85.27% <ø> (?)
unittests-Instrumentation.EventCounters	76.36% <ø> (?)
unittests-Instrumentation.GrpcNetClient	78.78% <ø> (?)
unittests-Instrumentation.Http	71.27% <ø> (?)
unittests-Instrumentation.Owin	83.43% <ø> (?)
unittests-Instrumentation.Process	100.00% <ø> (?)
unittests-Instrumentation.Runtime	100.00% <ø> (?)
unittests-Instrumentation.SqlClient	90.90% <ø> (?)
unittests-Instrumentation.StackExchangeRedis	71.00% <ø> (?)
unittests-Instrumentation.Wcf	48.91% <ø> (?)
unittests-PersistentStorage	66.44% <ø> (?)
unittests-ResourceDetectors.Azure	81.53% <ø> (?)
unittests-ResourceDetectors.Host	54.11% <ø> (?)
unittests-Resources.Gcp	39.60% <ø> (?)
unittests-Resources.Process	19.67% <ø> (?)
unittests-Resources.ProcessRuntime	82.35% <0.00%> (?)
unittests-Solution	80.17% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...Resources.ProcessRuntime/ProcessRuntimeDetector.cs	93.33% <ø> (ø)
...Runtime/ProcessRuntimeResourceBuilderExtensions.cs	0.00% <0.00%> (ø)

... and 275 files with indirect coverage changes

[rajkumar-rangaraj]

Require update to usage section in Readme, it still uses the old way of enablement which will not work -

opentelemetry-dotnet-contrib/src/OpenTelemetry.Resources.ProcessRuntime/README.md

Line 29 in bde8864

var tracerProvider = Sdk.CreateTracerProviderBuilder()

[Kielek]

LGTM (+ nit about the order), could you please resolve conflicts with main - you previous PR?