Fixes 3446: Aggregation Functions

[vga91]

    /*
    todo: step 1 https://duckdb.org/docs/sql/aggregates#general-aggregate-functions
        any_value(arg)	OK
        arg_max(arg, val)	NO -> apoc.agg.maxItems()
        arg_min(arg, val)	NO -> apoc.agg.minItems()
        avg(arg)	no -> avg() in Cypher
        bit_and(arg)	Returns the bitwise AND of all bits in a given expression .	bit_and(A)	-
        bit_or(arg)	Returns the bitwise OR of all bits in a given expression.	bit_or(A)	-
        bit_xor(arg)	Returns the bitwise XOR of all bits in a given expression.	bit_xor(A)	-
        bitstring_agg(arg)	Returns a bitstring with bits set for each distinct value.	bitstring_agg(A)	-
        bool_and(arg)	Returns true if every input value is true, otherwise false.	bool_and(A)	-
        bool_or(arg)	Returns true if any input value is true, otherwise false.	bool_or(A)	-
        count(arg)	NO
        favg(arg)	NO
        first(arg)	--> apoc.agg.first
        fsum(arg)	--> sum()
        geomean(arg)	Calculates the geometric mean for all tuples in arg.	geomean(A)	geometric_mean(A)
        histogram(arg)	Returns a MAP of key-value pairs representing buckets and counts.	histogram(A)	-
        last(arg)	--> apoc.agg.last
        list(arg)	--> collect()
        max(arg)	NO -> max()
        min(arg)	NO -> min()
        product(arg)	NO -> apoc.agg.product()
        string_agg(arg, sep)	NO --> apoc.agg.join
        sum(arg) --> sum()
        histogram(arg) --> maybe apoc.agg.statistics
        
        https://duckdb.org/docs/sql/aggregates#ordered-set-aggregate-functions --> NO percentileCont() and percentileDisc()
        
        TODO IN ANOTHER PR MAYBE:
            https://duckdb.org/docs/sql/aggregates#approximate-aggregates
            https://duckdb.org/docs/sql/aggregates#statistical-aggregates
                
     */
    
        /*
    VALID:
    any_value
    bit_and ok 
    bit_or ok
    bit_xor ok
    bitstring_agg
    bool_and --> called apoc.agg.all()
    bool_or -->  called apoc.agg.any()
    geomean --> ??
    histogram --> ??
    
     */

// todo - non è tanto chiaro cosa faccia `bitstring_agg` di DuckDB
// e se il concetto di bits set sia l'equivalente di java.util.BitSet