Remove support for array function and only support array[] style postgres syntax

[alamb]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
In apache/datafusion-sqlparser-rs#566, @MazterQyou is adding some more sophisticated support for array parsing in SQL and it turns out that postgres treats the the array keyword specially so it can't be a function

Datafusion already has support for the equivalent array creation using the postgres syntax array[] (note the brackets):

❯ select array[1,2];
+-------------+
| List([1,2]) |
+-------------+
| [1, 2]      |
+-------------+
1 row in set. Query took 0.053 seconds.
❯ select array(1,2);
+--------------------------+
| array(Int64(1),Int64(2)) |
+--------------------------+
| [1, 2]                   |
+--------------------------+
1 row in set. Query took 0.016 seconds.

Describe the solution you'd like
I propose removing support for select array(1,2) syntax to conform with posgres:

alamb=# select array[1,2];
 array 
-------
 {1,2}
(1 row)

alamb=# select array(1,2);
ERROR:  syntax error at or near "1"
LINE 1: select array(1,2);
                     ^

Describe alternatives you've considered
Do something special with parser

Additional context

This change will likely be required when we update to the next change of sqlparser: apache/datafusion-sqlparser-rs#566

[alamb]

Closed by #3199