MemoryLimiterProcessor - switch to MustNewID instead of zero value ID (#10128)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description
In an upcoming PR, I change Type to be an interface. This means the zero
value of Type will be nil - which will cause this test to fail.
Initializing ID instead of relying on the zero value fixes this

<!-- Issue number if applicable -->
#### Link to tracking issue
related to
#9429


<!--Please delete paragraphs that you did not use before submitting.-->
In preparation for
#10069

Author: ankitpatel96

processor/memorylimiterprocessor/memorylimiter_test.go

@@ -56,7 +56,9 @@ func TestNoDataLoss(t *testing.T) {
 	limiter, err := newMemoryLimiterProcessor(set, cfg)
 	require.NoError(t, err)
 
-	processor, err := processorhelper.NewLogsProcessor(context.Background(), processor.CreateSettings{}, cfg, exporter,
+	processor, err := processorhelper.NewLogsProcessor(context.Background(), processor.CreateSettings{
+		ID: component.MustNewID("nop"),
+	}, cfg, exporter,
 		limiter.processLogs,
 		processorhelper.WithStart(limiter.start),
 		processorhelper.WithShutdown(limiter.shutdown))