pgsql: Refactor function parse_output_parameters.

Refactor function parse_output_parameters.

Instead of using multiple parameters in parse_ouput_parameters function
signature, use the struct PGOutputData that encapsulates all pgoutput
options. It will be useful for future work where we need to add other
options in pgoutput.

Author: Euler Taveira
Reviewed-by: Amit Kapila
Discussion: https://postgr.es/m/CADK3HHJ-+9SO7KuRLH=9Wa1rAo60Yreq1GFNkH_kd0=CdaWM+A@mail.gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/531737ddad214cb8a675953208e2f3a6b1be122b

Modified Files
--------------
src/backend/replication/pgoutput/pgoutput.c | 24 +++++++++---------------
src/include/replication/pgoutput.h          |  1 +
2 files changed, 10 insertions(+), 15 deletions(-)