attest: add option to normalize property/union order when serializing types

[ssalbdivad]

This would allow alphabetizing properties/union members when serializing a type like:

declare const t: {
    b: "b" | "a"
    a: 1
}


attest(t).type.toString.normalizedSnap(`{
    a: 1
    b: "a" | "b"
}`)

Can be useful for property order that can change across versions

Have considered patching tsc (although it seems hard to access emitObjectLiteralExpression externally since it is defined in the createPrinter function). Also could potentially join displayParts, but some complexity there as well.