EF Core 6.0 temporal tables - Support specifying HISTORY_RETENTION_PERIOD

**What problem are you trying to solve?**

Right now there is no way to specify HISTORY_RETENTION_PERIOD when defining a temporal table. Also, EF Core doesn't create create a clustered index for PeriodEnd and PeriodStart columns in history table which is a prerequisite to use HISTORY_RETENTION_PERIOD.

**Describe the solution you'd like**
```
builder.ToTable(tableBuilder => tableBuilder.IsTemporal(temporalTableBuilder =>
{
temporalTableBuilder.HasPeriodStart("MyPeriodStart");
temporalTableBuilder.HasPeriodEnd("MyPeriodEnd");
temporalTableBuilder.UseHistoryTable("MyHistory");
temporalTableBuilder.UseHistoryRetentionPeriod("12 MONTHS"); // <--- something like this
}));
```