Support `BigInteger` and `BigDecimal` literals in SpEL expressions

[spring-projects-issues]

Rimal opened SPR-17225 and commented

Can we please add a suffix support for BigInteger as well in SpEL. 

Currently, we can add a long value as 12345456L (with the L suffix) but for a BigInteger, we need to mention it as new java.math.BigInteger('9248040402').

It would be really helpful if we could mention a BigInteger as 9248040402BI or something on these lines.

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No further details from SPR-17225

[ovmarkushyn]

@spring-projects-issues
Could you please consider PR#31301 as a possible solution for the request #21758.