fix: better error message on illegal arithmetic with NULL values

[cprasad1]

Description

This PR makes the error handling better when we try to do arithmetic with NULL.

ksql> SELECT NULL + 1 FROM s1 EMIT CHANGES;
Error processing expression (null + 1). Arithmetic on types null and INTEGER are not supported.

ksql> SELECT MAP(1 := 'cat') + NULL FROM s1 EMIT CHANGES;
Error processing expression: (MAP(1:='cat') + null). Arithmetic on types MAP<INTEGER, STRING> and null are not supported.

ksql> SELECT Array[1,2,3] + NULL FROM s1 EMIT CHANGES;
Error processing expression: (ARRAY[1, 2, 3] + null). Arithmetic on types ARRAY<INTEGER> and null are not supported.

ksql> SELECT 5.0 / NULL FROM s1 EMIT CHANGES;
Error processing expression: (5.0 / null). Arithmetic on types DECIMAL(2, 1) and null are not supported.

ksql> SELECT NULL * NULL FROM s1 EMIT CHANGES;
Error processing expression: (null * null). Arithmetic on types null and null are not supported.

Testing done

• manual testing
• Unit testing
• RQTT

Reviewer checklist

• Ensure docs are updated if necessary. (eg. if a user visible feature is being added or changed).
• Ensure relevant issues are linked (description should include text like "Fixes #")

[agavra]

Nice! A few nits before merging

[AlanConfluent]

Maybe it's outside the scope of this PR, but might be good to have tests for other expression types, e.g. COL > 1 AND NULL where we have a NULL literal used in other areas. I know this is a lot of surface area potentially.

[AlanConfluent]

LGTM

[guozhangwang]

LGTM!

[agavra]

Thanks @cprasad1!