[chore] Update types used in extensiontest.NewNopSettingsWithType (open-telemetry#37844)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description
This PR replaced `extensiontest.NopType` with actual factory type if
it's created. cc @mx-psi

<!-- Issue number (e.g. open-telemetry#1234) or full URL to issue, if applicable. -->
#### Link to tracking issue
Follow up PR of open-telemetry#37808 

<!--Describe what testing was performed and which tests were added.-->
#### Testing
n/a

<!--Describe the documentation added.-->
#### Documentation
n/a

<!--Please delete paragraphs that you did not use before submitting.-->

Author: sincejune

extension/observer/k8sobserver/extension_test.go

@@ -35,7 +35,7 @@ func TestNewExtension(t *testing.T) {
 	config := factory.CreateDefaultConfig().(*Config)
 	mockServiceHost(t, config)
 
-	ext, err := newObserver(config, extensiontest.NewNopSettingsWithType(extensiontest.NopType))
+	ext, err := newObserver(config, extensiontest.NewNopSettingsWithType(factory.Type()))
 	require.NoError(t, err)
 	require.NotNil(t, ext)
 }
@@ -46,7 +46,7 @@ func TestExtensionObserveServices(t *testing.T) {
 	config.ObservePods = false // avoid causing data race when multiple test cases running in the same process using podListerWatcher
 	mockServiceHost(t, config)
 
-	set := extensiontest.NewNopSettingsWithType(extensiontest.NopType)
+	set := extensiontest.NewNopSettingsWithType(factory.Type())
 	set.ID = component.NewID(metadata.Type)
 	ext, err := newObserver(config, set)
 	require.NoError(t, err)
@@ -135,7 +135,7 @@ func TestExtensionObservePods(t *testing.T) {
 	config := factory.CreateDefaultConfig().(*Config)
 	mockServiceHost(t, config)
 
-	set := extensiontest.NewNopSettingsWithType(extensiontest.NopType)
+	set := extensiontest.NewNopSettingsWithType(factory.Type())
 	set.ID = component.NewID(metadata.Type)
 	ext, err := newObserver(config, set)
 	require.NoError(t, err)
@@ -219,7 +219,7 @@ func TestExtensionObserveNodes(t *testing.T) {
 	config.ObservePods = false // avoid causing data race when multiple test cases running in the same process using podListerWatcher
 	mockServiceHost(t, config)
 
-	set := extensiontest.NewNopSettingsWithType(extensiontest.NopType)
+	set := extensiontest.NewNopSettingsWithType(factory.Type())
 	set.ID = component.NewID(metadata.Type)
 	ext, err := newObserver(config, set)
 	require.NoError(t, err)
@@ -320,7 +320,7 @@ func TestExtensionObserveIngresses(t *testing.T) {
 	config.ObserveIngresses = true
 	mockServiceHost(t, config)
 
-	set := extensiontest.NewNopSettingsWithType(extensiontest.NopType)
+	set := extensiontest.NewNopSettingsWithType(factory.Type())
 	set.ID = component.NewID(metadata.Type)
 	ext, err := newObserver(config, set)
 	require.NoError(t, err)

extension/observer/k8sobserver/factory_test.go

@@ -26,7 +26,7 @@ func TestFactory_Create(t *testing.T) {
 	factory := NewFactory()
 	cfg := factory.CreateDefaultConfig().(*Config)
 
-	ext, err := factory.Create(context.Background(), extensiontest.NewNopSettingsWithType(extensiontest.NopType), cfg)
+	ext, err := factory.Create(context.Background(), extensiontest.NewNopSettingsWithType(factory.Type()), cfg)
 	require.Error(t, err)
 	require.Nil(t, ext)
 }

extension/opampextension/factory_test.go

@@ -14,19 +14,21 @@ import (
 )
 
 func TestFactory_CreateDefaultConfig(t *testing.T) {
-	cfg := NewFactory().CreateDefaultConfig()
+	f := NewFactory()
+	cfg := f.CreateDefaultConfig()
 	assert.Equal(t, createDefaultConfig().(*Config), cfg)
 
 	assert.NoError(t, componenttest.CheckConfigStruct(cfg))
-	ext, err := createExtension(context.Background(), extensiontest.NewNopSettingsWithType(extensiontest.NopType), cfg)
+	ext, err := createExtension(context.Background(), extensiontest.NewNopSettingsWithType(f.Type()), cfg)
 	require.NoError(t, err)
 	require.NotNil(t, ext)
 	require.NoError(t, ext.Shutdown(context.Background()))
 }
 
 func TestFactory_Create(t *testing.T) {
-	cfg := NewFactory().CreateDefaultConfig()
-	ext, err := createExtension(context.Background(), extensiontest.NewNopSettingsWithType(extensiontest.NopType), cfg)
+	f := NewFactory()
+	cfg := f.CreateDefaultConfig()
+	ext, err := createExtension(context.Background(), extensiontest.NewNopSettingsWithType(f.Type()), cfg)
 	require.NoError(t, err)
 	require.NotNil(t, ext)
 	require.NoError(t, ext.Shutdown(context.Background()))