[beeswax] Remove indexes from the list of tables

struct TGetTablesReq {
  // Session to run this request against
  1: required TSessionHandle sessionHandle

  // Name of the catalog or a search pattern.
  2: optional TPatternOrIdentifier catalogName

  // Name of the schema or a search pattern.
  3: optional TPatternOrIdentifier schemaName

  // Name of the table or a search pattern.
  4: optional TPatternOrIdentifier tableName

  // List of table types to match
  // e.g. "TABLE", "VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY",
  // "LOCAL TEMPORARY", "ALIAS", "SYNONYM", etc.
  5: optional list<string> tableTypes
}