[otelcol] print-config feature-flag to beta (#14149)

#### Description
Enable `print-config` by default.

#### Link to tracking issue
Fixes #12369 

#### Testing
I ran `print-config` in a recent release, working as intended.

#### Documentation

The `print-config` command documentation is up to date.

---------

Co-authored-by: Alex Boten <[email protected]>
Co-authored-by: Damien Mathieu <[email protected]>

Author: 3 people

.chloggen/config-print-feature-gate.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. otlpreceiver)
+component: pkg/otelcol
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: This feature has been improved and tested; secure-by-default redacts configopaque values
+
+# One or more tracking issues or pull requests related to the change
+issues: [12369]
+
+# (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: [user]

otelcol/command_print.go

@@ -23,7 +23,7 @@ const featureGateName = "otelcol.printInitialConfig"
 
 var printCommandFeatureFlag = featuregate.GlobalRegistry().MustRegister(
 	featureGateName,
-	featuregate.StageAlpha,
+	featuregate.StageBeta,
 	featuregate.WithRegisterFromVersion("v0.120.0"),
 	featuregate.WithRegisterDescription("if set to true, enable the print-config command"),
 )