fix(sql): fix latest by factories not reacting to bind variable value change

[bziobrowski]

Fixes a number of latest by factories that cached and used the first bind variable value set.

Example:

CREATE TABLE IF NOT EXISTS tab (
    ts timestamp, 
    sym symbol, 
    isym symbol,
    h string,
    type char,
    stat char
), index(isym) timestamp(ts) partition by MONTH;

insert into tab values 
(0, 'S1', 'S1', 'h1', 'X', 'Y' ), 
(1, 'S2', 'S2', 'h2', 'X', 'Y' ), 
(3, null, null, 'h3', 'X', 'Y' );

select h, isym from 
(select h, stat, isym from tab 
  where sym = ? and type = 'X' latest on ts partition by sym 
) where stat='Y';

Running the last query with "S1" and then "S2" bind variable value or null returns the following in master branch :

h   isym
h1    S1

[ideoma]

[PR Coverage check]

😍 pass : 17 / 17 (100.00%)

file detail

	path	covered line	new line	coverage
🔵	io/questdb/griffin/engine/table/LatestByValueFilteredRecordCursor.java	1	1	100.00%
🔵	io/questdb/griffin/engine/table/AbstractLatestByValueRecordCursor.java	6	6	100.00%
🔵	io/questdb/griffin/engine/table/LatestByValueRecordCursor.java	1	1	100.00%
🔵	io/questdb/griffin/engine/table/AbstractDeferredValueRecordCursorFactory.java	6	6	100.00%
🔵	io/questdb/griffin/engine/table/LatestByValueIndexedFilteredRecordCursor.java	3	3	100.00%