Proposal: EF.Parameter(value).OptimizeFor(constantValue)

### What problem are you trying to solve?

Sometimes SQL Server does not generate optimal query plans based on parameter sniffing alone.

By injecting a value for EF to generate a query hint for, we can give SQL Server a better chance to generate optimal queries.

### Describe the solution you'd like

Add the fluent api EF.Parameter(value).OptimizeFor(constantValue) which then adds

`Option(Optimize For \@p__linq__0 = 'constantValue')` into the command text.