Reindex options work only when a single flag is set

https://github.com/citusdata/citus/blob/d50830d4cc939368b36af0b6fac9da1d4b2f408b/src/backend/distributed/deparser/citus_ruleutils.c#L757

There can be two options before PG14:

#define REINDEXOPT_VERBOSE (1 << 0) /* print progress info */
#define REINDEXOPT_REPORT_PROGRESS (1 << 1) /* report pgstat progress */

When both of them are set, this will fail. The fix is to use `&` instead of `==`.

A commit for this is added with pg14 PR but we should add tests to close this issue.