GC: Framework to use adapter's serialization writer. (#2032)

## Description
The MS Graph's adapter contains a serialization writer within it. Create a framework to use this writer rather than creating the object within serialization workflows. The writer library was used separately when the package still had many bugs and the most current version was required. This does not change any of the writer instances within the package. Will change out the writer instances in follow-up PRs.

<!-- Insert PR description-->

## Does this PR need a docs update or release note?

- [x] ⛔ No 

## Type of change

<!--- Please check the type of change your PR introduces: --->
- [x] 🌻 Feature


## Issue(s)

<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->
*related to  #2031 <issue>

## Test Plan
- [x] ⚡ Unit test

src/internal/connector/graph/service.go

@@ -3,7 +3,9 @@ package graph
 import (
 	"context"
 
+	absser "github.com/microsoft/kiota-abstractions-go/serialization"
 	msgraphsdk "github.com/microsoftgraph/msgraph-sdk-go"
+	"github.com/pkg/errors"
 
 	"github.com/alcionai/corso/src/pkg/account"
 	"github.com/alcionai/corso/src/pkg/path"
@@ -43,6 +45,22 @@ func (s Service) Client() *msgraphsdk.GraphServiceClient {
 	return s.client
 }
 
+// Seraialize writes an M365 parsable object into a byte array using the built-in
+// application/json writer within the adapter.
+func (s Service) Serialize(object absser.Parsable) ([]byte, error) {
+	writer, err := s.adapter.GetSerializationWriterFactory().GetSerializationWriter("application/json")
+	if err != nil || writer == nil {
+		return nil, errors.Wrap(err, "creating json serialization writer")
+	}
+
+	err = writer.WriteObjectValue("", object)
+	if err != nil {
+		return nil, errors.Wrap(err, "writeObjecValue serialization")
+	}
+
+	return writer.GetSerializedContent()
+}
+
 type Servicer interface {
 	// Client() returns msgraph Service client that can be used to process and execute
 	// the majority of the queries to the M365 Backstore

src/internal/connector/graph/service_test.go

@@ -0,0 +1,64 @@
+package graph_test
+
+import (
+	"testing"
+
+	"github.com/microsoftgraph/msgraph-sdk-go/models"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/suite"
+
+	"github.com/alcionai/corso/src/internal/connector/graph"
+	"github.com/alcionai/corso/src/internal/tester"
+	"github.com/alcionai/corso/src/pkg/account"
+)
+
+type GraphUnitSuite struct {
+	suite.Suite
+	credentials account.M365Config
+}
+
+func TestGraphUnitSuite(t *testing.T) {
+	suite.Run(t, new(GraphUnitSuite))
+}
+
+func (suite *GraphUnitSuite) SetupSuite() {
+	t := suite.T()
+	a := tester.NewM365Account(t)
+	m365, err := a.M365Config()
+	require.NoError(t, err)
+
+	suite.credentials = m365
+}
+
+func (suite *GraphUnitSuite) TestCreateAdapter() {
+	t := suite.T()
+	adpt, err := graph.CreateAdapter(
+		suite.credentials.AzureTenantID,
+		suite.credentials.AzureClientID,
+		suite.credentials.AzureClientSecret,
+	)
+
+	assert.NoError(t, err)
+	assert.NotNil(t, adpt)
+}
+
+func (suite *GraphUnitSuite) TestSerializationEndPoint() {
+	t := suite.T()
+	adpt, err := graph.CreateAdapter(
+		suite.credentials.AzureTenantID,
+		suite.credentials.AzureClientID,
+		suite.credentials.AzureClientSecret,
+	)
+	require.NoError(t, err)
+
+	serv := graph.NewService(adpt)
+	email := models.NewMessage()
+	subject := "TestSerializationEndPoint"
+	email.SetSubject(&subject)
+
+	byteArray, err := serv.Serialize(email)
+	assert.NoError(t, err)
+	assert.NotNil(t, byteArray)
+	t.Log(string(byteArray))
+}