Set the ordering as the identifier when translating VALUES

[roji]

Our translation of inline collections to SQL ValuesExpression does not specify an identifier, making it impossible to use project in certain query contexts.

Flagged by @maumar in #33410 (comment)

[maumar]

@roji, should we patch this, given that #33410 is a regression and the fix is not too complicated?

[roji]

See #33438 (comment)

[roji]

Decision: we won't backport this since the workaround is trivial (add AsEnumerable()), and this doesn't actually address the customer-reported issue (which is about Concat, whereas this fixed Union). If additional user reports come in, we can reconsider.