Align TemporalLiteral toString with the outcome of Jakarta Persistence 453

[njr-11]

This will probably need to be revisited in light of jakartaee/persistence#453. (Currently an issue in the Persistence project, but really belongs in Query.)

Originally posted by @gavinking in #1101 (comment)

[otaviojava]

This dicussion was moved to Jakarta Query spec: jakartaee/query#130