cmd/builder: clarify CLI error handling and update changelog

Author: Syedowais312

.chloggen/fix_ocb-duplicate-cli-error-log.yaml

@@ -0,0 +1,25 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. receiver/otlp)
+component: cmd/builder
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Avoid duplicate CLI error logging in generated collector binaries by relying on cobra's error handling.
+
+# One or more tracking issues or pull requests related to the change
+issues: [14317]
+
+# (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:
+
+# 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: []

cmd/builder/internal/builder/templates/main.go.tmpl

@@ -59,6 +59,8 @@ func main() {
 	}
 
 	if err := run(set); err != nil {
+	 // The error message is logged by cobra, so we intentionally
+    // avoid logging it again here to prevent duplicate output.
 		os.Exit(1)
 	}
 }