destination-redshift: Fix StackOverflowError with eager rendering of nested jooq function call sql.

[gisripa]

What

Fixes #33759

How

Building the recursive function() doesn't seem to be the problem, the StackOverflowError happens at 2000 columns, which is arbitrary depending on the Stack Size allocated by JVM (which can be increased by -Xms). The problem seems to be lurking in how the SQL string rendering happens where function(...function(... nested references are creating StackOverflowError. Fix is to render the SQL at every step of nesting to avoid deep stack.

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[edgao]

don't forget to update the arrayConcatStmt javadoc to say it's not recursive :P