Factor out function to retrieve backup details (#1894)

## Description

Given a backup ID pull the backup details for the backup. This function will also be used during incremental backups as the backup details from the base snapshot(s) will need merged with the details generated by backing up new/changed items.

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

- [ ] ✅ Yes, it's included
- [ ] 🕐 Yes, but in a later PR
- [x] ⛔ No 

## Type of change

- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Test
- [ ] 💻 CI/Deployment
- [x] 🐹 Trivial/Minor

## Issue(s)

* #1800 

## Test Plan

<!-- How will this be tested prior to merging.-->
- [ ] 💪 Manual
- [ ] ⚡ Unit test
- [x] 💚 E2E

src/internal/operations/common.go

@@ -0,0 +1,38 @@
+package operations
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+
+	"github.com/alcionai/corso/src/internal/kopia"
+	"github.com/alcionai/corso/src/internal/model"
+	"github.com/alcionai/corso/src/internal/streamstore"
+	"github.com/alcionai/corso/src/pkg/backup"
+	"github.com/alcionai/corso/src/pkg/backup/details"
+	"github.com/alcionai/corso/src/pkg/path"
+	"github.com/alcionai/corso/src/pkg/store"
+)
+
+func getBackupAndDetailsFromID(
+	ctx context.Context,
+	tenant string,
+	backupID model.StableID,
+	service path.ServiceType,
+	ms *store.Wrapper,
+	kw *kopia.Wrapper,
+) (*backup.Backup, *details.Details, error) {
+	dID, bup, err := ms.GetDetailsIDFromBackupID(ctx, backupID)
+	if err != nil {
+		return nil, nil, errors.Wrap(err, "getting backup details ID")
+	}
+
+	deets, err := streamstore.
+		New(kw, tenant, service).
+		ReadBackupDetails(ctx, dID)
+	if err != nil {
+		return nil, nil, errors.Wrap(err, "getting backup details data")
+	}
+
+	return bup, deets, nil
+}

src/internal/operations/restore.go

@@ -18,7 +18,6 @@ import (
 	"github.com/alcionai/corso/src/internal/model"
 	"github.com/alcionai/corso/src/internal/observe"
 	"github.com/alcionai/corso/src/internal/stats"
-	"github.com/alcionai/corso/src/internal/streamstore"
 	"github.com/alcionai/corso/src/pkg/account"
 	"github.com/alcionai/corso/src/pkg/backup/details"
 	"github.com/alcionai/corso/src/pkg/control"
@@ -118,21 +117,16 @@ func (op *RestoreOperation) Run(ctx context.Context) (restoreDetails *details.De
 		}
 	}()
 
-	dID, bup, err := op.store.GetDetailsIDFromBackupID(ctx, op.BackupID)
+	bup, deets, err := getBackupAndDetailsFromID(
-	if err != nil {
+		ctx,
-		err = errors.Wrap(err, "getting backup details ID for restore")
-		opStats.readErr = err
-
-		return nil, err
-	}
-
-	deets, err := streamstore.New(
-		op.kopia,
 		op.account.ID(),
+		op.BackupID,
 		op.Selectors.PathService(),
-	).ReadBackupDetails(ctx, dID)
+		op.store,
+		op.kopia,
+	)
 	if err != nil {
-		err = errors.Wrap(err, "getting backup details data for restore")
+		err = errors.Wrap(err, "restore")
 		opStats.readErr = err
 
 		return nil, err