Standardize use of REFRESH PUBLICATION in code and messages.

Standardize use of REFRESH PUBLICATION in code and messages.

This patch replaces ALTER SUBSCRIPTION REFRESH with
ALTER SUBSCRIPTION REFRESH PUBLICATION in comments and error messages to
improve clarity and support future extensibility. The change aligns with
upcoming addition REFRESH SEQUENCES for sequence synchronization.

Author: vignesh C <[email protected]>
Author: Hou Zhijie <[email protected]>
Reviewed-by: shveta malik <[email protected]>
Reviewed-by: Dilip Kumar <[email protected]>
Reviewed-by: Peter Smith <[email protected]>
Reviewed-by: Hayato Kuroda <[email protected]>
Reviewed-by: Amit Kapila <[email protected]>
Discussion: https://postgr.es/m/CAA4eK1LC+KJiAkSrpE_NwvNdidw9F2os7GERUeSxSKv71gXysQ@mail.gmail.com