Define supported numeric promotions

Define the following numeric promotions for function parameters and comparisons within filter expressions: § If either operand is Edm.Double, the other operand is converted to type Edm.Double. § Otherwise, if either operand is Edm.Single, the other operand is converted to type Edm.Single. § Otherwise, if either operand is of type Edm.Decimal, the other operand is converted to Edm.Decimal. § Otherwise, if either operand is Edm.Int64, the other operand is converted to type Edm.Int64. § Otherwise, if either operand is Edm.Int32, the other operand is converted to type Edm.Int32 § Otherwise, if either operand is Edm.Int16, the other operand is converted to type Edm.Int16. § If binary numeric promotion is supported, a service SHOULD use the same semantics as a castExpression to promote an operand to the target type. § There's no implicit conversion between string and numeric types. Accepted: https://www.oasis-open.org/apps/org/workgroup/odata/download.php/47764/latest/odata-meeting-19_on-20121220-minutes.html