fix: memory leak in tconfig.c in client

feat: implementation of parser and planner for stmt API

Update fulltest.sh

test: fix the between test case

* fix(query): fix timediff args cannot be integer values

TD-14798

* fix(query): fix timediff/timetruncate/to_unixtimestamp handling NULL value and empty string

TD-14802
TD-14803

* refactor(query): constant NULL value processing logic

TD-14802
TD-14803

* refactor(query): support timefunction arithmetic operation with boolean
constant

fix(cluster): crash while create rollup sma

fix(os): getline memory free error.

refactor(cluster): make the comment and code of udf to variable length

add between python case

enh: support variables like $data[0][1] and $data(db)[0] in tsim scripts

feat: block-wise sma integrate

enh(query): set the parameters for system database to be NULL

fix(query): translate var type from value node to SVariant should include var header