Added nano- micro- milliseconds unit for date_trunc

[Misz606]

Fixes. https://github.com/ClickHouse/clickhouse-core-incidents/issues/89

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Added nano- micro- milliseconds unit for date_trunc

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• Documentation is written (mandatory for new features)

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[robot-ch-test-poll1]

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[alexey-milovidov]

Also, add tests for times before the Unix epoch, e.g. 1969. It is different because the underlying values are negative and there is a chance that fractions can be calculated incorrectly.

[yariks5s]

The thing is that new time units work OK with times before the Unix epoch, but bigger time units return strange results. Some of them return 1970-01-01: https://fiddle.clickhouse.com/0f8c3b48-252d-43ac-ab23-7b94fc8e6f3e, some of them return strange results: https://fiddle.clickhouse.com/f85fd340-a496-4678-a859-9e66091d58f4. I will make an issue about that.

upd: #62345

[alexey-milovidov]

AST fuzzer (asan) — Received signal 11

This requires investigation 🚀

Performance Comparison [1/4] — 6 errors, 1 faster, 1 unstable

Please merge with master ❤️