[mdatagen] mark Meter as deprecated (#10939)

This is split from
#10912

---------

Signed-off-by: Alex Boten <223565+codeboten@users.noreply.github.com>

.chloggen/codeboten_mark-meter-deprecated.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: deprecation
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: mdatagen
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Deprecating generated `Meter` func in favour of `LeveledMeter`"
+
+# One or more tracking issues or pull requests related to the change
+issues: [10939]
+
+# (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: [api]

cmd/mdatagen/main_test.go

@@ -569,6 +569,7 @@ import (
 	"go.opentelemetry.io/collector/config/configtelemetry"
 )
 
+// Deprecated: [v0.108.0] use LeveledMeter instead.
 func Meter(settings component.TelemetrySettings) metric.Meter {
 	return settings.MeterProvider.Meter("")
 }
@@ -607,6 +608,7 @@ import (
 	"go.opentelemetry.io/collector/config/configtelemetry"
 )
 
+// Deprecated: [v0.108.0] use LeveledMeter instead.
 func Meter(settings component.TelemetrySettings) metric.Meter {
 	return settings.MeterProvider.Meter("")
 }

cmd/mdatagen/templates/telemetry.go.tmpl

@@ -21,6 +21,7 @@ import (
     "go.opentelemetry.io/collector/config/configtelemetry"
 )
 
+// Deprecated: [v0.108.0] use LeveledMeter instead.
 func Meter(settings component.TelemetrySettings) metric.Meter {
 	return settings.MeterProvider.Meter("{{ .ScopeName }}")
 }

cmd/mdatagen/templates/telemetry_test.go.tmpl

@@ -14,6 +14,7 @@ import (
 	nooptrace "go.opentelemetry.io/otel/trace/noop"
 
 	"go.opentelemetry.io/collector/component"
+	"go.opentelemetry.io/collector/config/configtelemetry"
 )
 
 type mockMeter struct {