Fix casting from varchar to numeric with spaces

[wendigo]

Java has inconsistent behaviour of the [Primitive].parse* methods:

Long.parseLong(" 1337 ") throws the NumberFormatException, while Float.parseFloat(" 1337 ") parses successfully.

FloatingDecimal class has the following code:

            in = in.trim(); // don't fool around with white space.

Let's not fool around and trim every varchar before parsing.

Fixes #23359

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# Section
* Fix some things. ({issue}`issuenumber`)

[losipiuk]

What does standard say about it?

[losipiuk]

What does standard say about it?

Or postgres at least

[wendigo]

After this change this is consistent postgresql:

postgres=# select CAST(VARCHAR ' 1 ' AS INTEGER)
;
 int4
------
    1
(1 row)

postgres=# select CAST(VARCHAR ' 10' AS INTEGER)
;
 int4
------
   10
(1 row)

postgres=# select CAST(' 10' AS INTEGER)
;
 int4
------
   10
(1 row)

postgres=# select CAST(' 10 ' AS BIGINT)
;
 int8
------
   10
(1 row)

[wendigo]