[#25232] YSQL: Fix style in tablecmds.c

Summary:
Fix linter errors and warnings in tablecmds.c

Purely a stylistic change.
Jira: DB-14421

Test Plan: Jenkins: compile only

Reviewers: jason

Reviewed By: jason

Subscribers: yql

Differential Revision: https://phorge.dev.yugabyte.com/D40591