[processor/resourcedetection] Move processor.resourcedetection.hostCPUSteppingAsString feature gate to stable (#35202)

**Description:** <Describe what has changed.>
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->

Follows
#33076
and
#31165.

**Link to tracking Issue:** <Issue number if applicable>
#31136

**Testing:** <Describe what testing was performed and which tests were
added.>

**Documentation:** <Describe the documentation added.>

/cc @mx-psi

Signed-off-by: ChrsMark <chrismarkou92@gmail.com>

Author: ChrsMark

.chloggen/cpu_stepping_fg_stable.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: resourcedetectionprocessor
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Move `processor.resourcedetection.hostCPUSteppingAsString` feature gate to stable.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [31136]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

processor/resourcedetectionprocessor/internal/system/internal/metadata/resource_int_version.go

@@ -31,12 +31,12 @@ var (
 		featuregate.WithRegisterToVersion("v0.101.0"),
 		featuregate.WithRegisterReferenceURL("https://github.com/open-telemetry/semantic-conventions/issues/495"),
 	)
-	hostCPUSteppingAsStringID          = "processor.resourcedetection.hostCPUSteppingAsString"
-	hostCPUSteppingAsStringFeatureGate = featuregate.GlobalRegistry().MustRegister(
-		hostCPUSteppingAsStringID,
-		featuregate.StageBeta,
+	_ = featuregate.GlobalRegistry().MustRegister(
+		"processor.resourcedetection.hostCPUSteppingAsString",
+		featuregate.StageStable,
 		featuregate.WithRegisterDescription("Change type of host.cpu.stepping to string."),
 		featuregate.WithRegisterFromVersion("v0.95.0"),
+		featuregate.WithRegisterToVersion("v0.110.0"),
 		featuregate.WithRegisterReferenceURL("https://github.com/open-telemetry/semantic-conventions/issues/664"),
 	)
 )
@@ -215,15 +215,6 @@ func setHostCPUInfo(d *Detector, cpuInfo cpu.InfoStat) {
 	}
 
 	d.rb.SetHostCPUModelName(cpuInfo.ModelName)
-	if hostCPUSteppingAsStringFeatureGate.IsEnabled() {
-		d.rb.SetHostCPUStepping(fmt.Sprintf("%d", cpuInfo.Stepping))
-	} else {
-		// https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/31136
-		d.logger.Info("This attribute will change from int to string. Switch now using the feature gate.",
-			zap.String("attribute", "host.cpu.stepping"),
-			zap.String("feature gate", hostCPUSteppingAsStringID),
-		)
-		d.rb.SetHostCPUSteppingAsInt(int64(cpuInfo.Stepping))
-	}
+	d.rb.SetHostCPUStepping(fmt.Sprintf("%d", cpuInfo.Stepping))
 	d.rb.SetHostCPUCacheL2Size(int64(cpuInfo.CacheSize))
 }