Validate casts from double literals to numeric during expression conversion.

Numeric values in ZetaSQL are subject to constraints: they must fall within certain hardcoded limits, and the scale also cannot exceed 9. Currently we have stricter constraints than these when preparing the expression in BeamZetaSqlCalcRel due to BEAM-12046. However, to force BeamCalcRel to have correct behavior, we should check the constraints earlier, during expression conversion.

https://github.com/google/zetasql/blob/697da738be2af3b6b9492c73c55616d8b9fed0b6/javatests/com/google/zetasql/ValueTest.java#L727-L745