[mdatagen] fix a missing import in a generated test file (#10970)

Fixes #10969

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

.chloggen/codeboten_fix-10969.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: bug_fix
+
+# 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: Fix a missing import in the generated test file
+
+# One or more tracking issues or pull requests related to the change
+issues: [10969]
+
+# (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/mdatagen/templates/component_telemetry_test.go.tmpl

@@ -7,6 +7,9 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/require"
+	{{- if or isConnector isExporter isExtension isProcessor isReceiver }}
+	"go.opentelemetry.io/otel/metric"
+	{{- end }}
 	"go.opentelemetry.io/otel/sdk/metric/metricdata"
 	"go.opentelemetry.io/otel/sdk/metric/metricdata/metricdatatest"
 	sdkmetric "go.opentelemetry.io/otel/sdk/metric"