[EPIC] Support try_* functions which always return NULL instead of runtime errors

[advancedxy]

Spark adds a lot of try_* functions in the recent two years, which always return NULL instead of runtime errors. The list is as follows:

• [ ] try_add
• [ ] try_divide
• [ ] try_subtract
• [ ] try_multiply
• [ ] try_element_at
• [ ] try_avg
• [ ] try_sum
• [ ] try_to_binary
• [ ] try_to_timestamp
• [ ] try_aes_decrypt
• [x] ~~try_reflect~~ (cannot be supported in Comet?)
• [ ] try_cast (part of https://github.com/apache/datafusion-comet/issues/286)

We should add support to these functions too. It could be implemented in Comet first then contributed back to upstream DataFusion.

Originally posted by @viirya in https://github.com/apache/arrow-datafusion-comet/pull/277#discussion_r1568139442

[andygrove]

I added try_cast to the list, with a link to the cast epic