reduce load test to default folders (#1062)

## Description

Load Testing is causing folder growth (fix is underway)
and is already taking > 4 hours only to back-up emails.
This reduces the dataset to only the primary folders for
each exchange type.  We can expand from here when
data production is better under control.

## Type of change

- [x] 🤖 Test

## Issue(s)

* #902

## Test Plan

- [x] 💚 E2E

src/pkg/repository/repository_load_test.go

@@ -9,6 +9,7 @@ import (
 	"github.com/stretchr/testify/require"
 	"github.com/stretchr/testify/suite"
 
+	"github.com/alcionai/corso/src/internal/connector/exchange"
 	"github.com/alcionai/corso/src/internal/operations"
 	"github.com/alcionai/corso/src/internal/tester"
 	"github.com/alcionai/corso/src/pkg/account"
@@ -234,7 +235,9 @@ func (suite *RepositoryLoadTestExchangeSuite) TestExchange() {
 
 	// backup
 	bsel := selectors.NewExchangeBackup()
-	bsel.Include(bsel.MailFolders(selectors.Any(), selectors.Any()))
+	bsel.Include(bsel.MailFolders(selectors.Any(), []string{exchange.DefaultMailFolder}))
+	bsel.Include(bsel.ContactFolders(selectors.Any(), []string{exchange.DefaultContactFolder}))
+	bsel.Include(bsel.EventCalendars(selectors.Any(), []string{exchange.DefaultCalendar}))
 
 	b, err := r.NewBackup(ctx, bsel.Selector)
 	require.NoError(t, err)