Change syntax of EXCEPT TABLE clause in publication commands.

Change syntax of EXCEPT TABLE clause in publication commands.

Adjust the syntax of the EXCEPT clause in CREATE/ALTER PUBLICATION
added in commits fd366065e0 and 493f8c6439 to move the TABLE keyword
inside the relation list.

Old syntax:
CREATE PUBLICATION ... FOR ALL TABLES EXCEPT TABLE (t1, ...);
ALTER PUBLICATION  ... SET ALL TABLES EXCEPT TABLE (t1, ...);

New syntax:
CREATE PUBLICATION ... FOR ALL TABLES EXCEPT (TABLE t1, ...);
ALTER PUBLICATION  ... SET ALL TABLES EXCEPT (TABLE t1, ...);

This is to ensure that inclusion and exclusion list can be specified in
a same way. Previously, the exclusion table list can be specified as
TABLE (t1, t2, t3) and inclusion list can be specified as TABLE t1, t2,
t3, or TABLE t1, TABLE t2, TABLE t3.

This change is purely syntactic and does not alter behavior.

Reported-by: Masahiko Sawada <sawada.mshk@gmail.com>
Author: vignesh C <vignesh21@gmail.com>
Author: Shlok Kyal <shlok.kyal.oss@gmail.com>
Reviewed-by: shveta malik <shveta.malik@gmail.com>
Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Reviewed-by: Zhijie Hou <houzj.fnst@fujitsu.com>
Reviewed-by: Dilip Kumar <dilipbalaut@gmail.com>
Reviewed-by: SATYANARAYANA NARLAPURAM <satyanarlapuram@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CAD21AoCC8XuwfX62qKBSfHUAoww_XB3_84HjswgL9jxQy696yw@mail.gmail.com
Discussion: https://postgr.es/m/CALDaNm3=JrucjhiiwsYQw5-PGtBHFONa6F7hhWCXMsGvh=tamA@mail.gmail.com