OSF: Used model.NewPointer everywhere (#27838)

```release-note
NONE
```

server/public/model/user_test.go

@@ -35,7 +35,7 @@ func TestUserAuditable(t *testing.T) {
 			DeleteAt:       now,
 			Username:       "some user_name",
 			Password:       "some password",
-			AuthData:       NewString("some_auth_data"),
+			AuthData:       NewPointer("some_auth_data"),
 			AuthService:    UserAuthServiceLdap,
 			Email:          "test@example.org",
 			EmailVerified:  true,
@@ -51,7 +51,7 @@ func TestUserAuditable(t *testing.T) {
 			Locale:    DefaultLocale,
 			Timezone:  timezones.DefaultUserTimezone(),
 			MfaActive: true,
-			RemoteId:  NewString("some_remote"),
+			RemoteId:  NewPointer("some_remote"),
 		}
 		m := u.Auditable()
 
@@ -115,7 +115,7 @@ func TestUserLogClone(t *testing.T) {
 			DeleteAt:       now,
 			Username:       "some user_name",
 			Password:       "some password",
-			AuthData:       NewString("some_auth_data"),
+			AuthData:       NewPointer("some_auth_data"),
 			AuthService:    UserAuthServiceLdap,
 			Email:          "test@example.org",
 			EmailVerified:  true,
@@ -131,7 +131,7 @@ func TestUserLogClone(t *testing.T) {
 			Locale:    DefaultLocale,
 			Timezone:  timezones.DefaultUserTimezone(),
 			MfaActive: true,
-			RemoteId:  NewString("some_remote"),
+			RemoteId:  NewPointer("some_remote"),
 		}
 
 		l := u.LogClone()
@@ -173,7 +173,7 @@ func TestUserDeepCopy(t *testing.T) {
 	mapKey := "key"
 	mapValue := "key"
 
-	user := &User{Id: id, AuthData: NewString(authData), Props: map[string]string{}, NotifyProps: map[string]string{}, Timezone: map[string]string{}}
+	user := &User{Id: id, AuthData: NewPointer(authData), Props: map[string]string{}, NotifyProps: map[string]string{}, Timezone: map[string]string{}}
 	user.Props[mapKey] = mapValue
 	user.NotifyProps[mapKey] = mapValue
 	user.Timezone[mapKey] = mapValue
@@ -281,7 +281,7 @@ func TestUserIsValid(t *testing.T) {
 	appErr = user.IsValid()
 	require.True(t, HasExpectedUserIsValidError(appErr, "email", user.Id, user.Email), "expected user is valid error: %s", appErr.Error())
 
-	user.RemoteId = NewString(NewId())
+	user.RemoteId = NewPointer(NewId())
 	require.Nil(t, user.IsValid())
 
 	user.FirstName = strings.Repeat("a", 65)
@@ -324,10 +324,10 @@ func TestUserSanitizeInput(t *testing.T) {
 	user.Nickname = "nickname"
 	user.FirstName = "firstname"
 	user.LastName = "lastname"
-	user.RemoteId = NewString(NewId())
+	user.RemoteId = NewPointer(NewId())
 	user.Position = "position"
 	user.Roles = "system_admin"
-	user.AuthData = NewString("authdata")
+	user.AuthData = NewPointer("authdata")
 	user.AuthService = "saml"
 	user.EmailVerified = true
 	user.FailedAttempts = 10
@@ -336,10 +336,10 @@ func TestUserSanitizeInput(t *testing.T) {
 	user.SanitizeInput(false)
 
 	// these fields should be reset
-	require.Equal(t, NewString(""), user.AuthData)
+	require.Equal(t, NewPointer(""), user.AuthData)
 	require.Equal(t, "", user.AuthService)
 	require.False(t, user.EmailVerified)
-	require.Equal(t, NewString(""), user.RemoteId)
+	require.Equal(t, NewPointer(""), user.RemoteId)
 	require.Equal(t, int64(0), user.CreateAt)
 	require.Equal(t, int64(0), user.UpdateAt)
 	require.Equal(t, int64(0), user.DeleteAt)