Add SqlServer translation for DateOnly.ToDateTime(timeOnly)

[mseada94]

Fixes #35076

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I created the PR as draft

• The translation is done as expected
• TODO: I have an issue in comparison between datetime and string, I need to cast const value as datetime please guide where to look
• TODO: add support for DateOnly as constant with TimeOnly Property

[mseada94]

The translation is done as expected but I have issue in the where comparison which compare date with datetime

Error Message on test: 

Microsoft.Data.SqlClient.SqlException : Conversion failed when converting date and/or time from character string.

SQL sent to the database:

SELECT [m].[Id], [m].[BriefingDocument], [m].[BriefingDocumentFileExtension], [m].[CodeName], [m].[Date], [m].[Difficulty], [m].[Duration], [m].[Rating], [m].[Time], [m].[Timeline]
FROM [Missions] AS [m]
WHERE DATETIMEFROMPARTS(DATEPART(year, [m].[Date]), DATEPART(month, [m].[Date]), DATEPART(day, [m].[Date]), DATEPART(hour, [m].[Time]), DATEPART(minute, [m].[Time]), DATEPART(second, [m].[Time]), DATEPART(millisecond, [m].[Time])) = '1990-11-10T10:15:50.5000000'

[mseada94]

@dotnet-policy-service agree

[roji]

I think the translation should be to DATETIME2FROMPARTS (which returns SQL Server datetime2), rather than DATETIMEFROMPARTS (which returns the discouraged datetime.

We also need to refrain from doing the translation when either the DateOnly or the TimeOnly are a complex SQL expression (anything other than a column/constant/parameter), for performance reasons; see #35076 (comment).