fix(isthmus): fix argument order for trim function mapping

[nielspardon]

The Calcite/SQL trim function has the following syntax:

TRIM(BOTH characters FROM input)
TRIM(LEADING characters FROM input)
TRIM(TRAILING characters FROM input)

https://calcite.apache.org/docs/reference.html#character-string-operators-and-functions

While the Substrait trim, ltrim, rtrim functions are defined as:

trim(input, characters)
ltrim(input, characters)
rtrim(input, characters)

https://github.com/substrait-io/substrait/blob/ee109ad48f149f2e3706d51b597febe86b79b225/extensions/functions_string.yaml#L1299-L1363

This PR fixes the argument order for the trim function mapping in isthmus by swapping the input and characters arguments during conversion.