[mdatagen] apply fieldalignment to generated code (#12121)

#### Description
Change the generated code so it doesn't get impacted if you run
fieldalignment.

.chloggen/fieldalignment_generated.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: apply fieldalignment to generated code
+
+# One or more tracking issues or pull requests related to the change
+issues: [12121]
+
+# (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/internal/templates/component_test.go.tmpl

@@ -74,8 +74,8 @@ func TestComponentLifecycle(t *testing.T) {
 	factory := NewFactory()
 
 	tests := []struct{
-		name string
 		createFn func(ctx context.Context, set exporter.Settings, cfg component.Config) (component.Component, error)
+		name string
 	}{
 {{ if supportsLogs }}
 		{