Revert to non-truncating mbql.u/unique-name-generator in annotate-native-cols (#47866)

* Rollback to legacy unique-name-generator in annotate-native-cols

* Add native query long column alias test to nested queries tests

* Add native query long column alias test to dataset api tests

* Add native query long column alias test to models e2e tests

* Move limit into inner native query

* PR suggestion: simplify lambda argslist

Co-authored-by: metamben <103100869+metamben@users.noreply.github.com>

* PR suggestion: remove unnecessary mt/with-temp-copy-of-db

* Tweak test name

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Co-authored-by: metamben <103100869+metamben@users.noreply.github.com>