Truncate access review roles with badge list

Long role strings in the access review table broke row layout when
drivers joined many roles into one comma-separated value. Expose
roles as a string array in GraphQL by splitting the stored role at
the API layer, and render the first three roles as badges with a
"+X more" popover for the rest.

Closes ENG-459.

Signed-off-by: Ludovic Vielle <ludovic@probo.com>

pkg/accessreview/drivers/notion.go

@@ -80,7 +80,7 @@ func (d *NotionDriver) ListAccounts(ctx context.Context) ([]AccountRecord, error
 			record := AccountRecord{
 				Email:       email,
 				FullName:    u.Name,
-				Role:        "Member",
+				Roles:       []string{"Member"},
 				IsAdmin:     false,
 				ExternalID:  u.ID,
 				MFAStatus:   coredata.MFAStatusUnknown,