json integration: identifying new data-source and execute json flow.

json integration: identifying new data-source and execute json flow.
s3select submodule

integrate the limit-operator into RGW. current changes is for CSV format

integrate the limit-operator with CSV-flow, and JSON-flow. an update of s3select submodule

a fix for the input-serialization-type selection

debug functionality.

fix for error handling

adding the scan-range feature. i.e. enables the user to define the range of processing(text only)

remove the temp variable(the s3select-layer handles the sql-result setting upon JSON flow)

adding documentation. for JSON, SQL limit-operator, scan-range option.
a fix for JSON test framework in s3select module

investigate crash. replace len with it.length()

editorial changes; non-initialized variables

adding validation for offset&length. (it seems that the offset&length causes Invalid reads, in some cases)

changes related to trino integration.(1) syntax issues related to trino-engine statement conbersions(s3select parser handles that) (2).
(2). trino rejects(HIVE_CURSUR_ERROR) some of the s3select responses do to its size, the change is about control the size of the respond.

update JSON documentation

trino changes: response in paging (limitation on size), trino syntax issues.

Signed-off-by: galsalomon66 <gal.salomon@gmail.com>