Fix writable CTE on replicated tables EXCEPT partition tables.

[avamingli]

Fix issue: #1240

Replicated locus could EXCEPT Partitioned locus when there is writable CTE on replicated tables.
We could make them SingleQE or Entry to do the set operation.

with result as (update r_1240 set a = a +1 where a < 5 returning *) select * from result except select * from p1_1240;
                          QUERY PLAN
---------------------------------------------------------------
 HashSetOp Except
   ->  Append
         ->  Explicit Gather Motion 3:1  (slice1; segments: 3)
               ->  Subquery Scan on "*SELECT* 1"
                     ->  Update on r_1240
                           ->  Seq Scan on r_1240
                                 Filter: (a < 5)
         ->  Gather Motion 3:1  (slice2; segments: 3)
               ->  Subquery Scan on "*SELECT* 2"
                     ->  Seq Scan on p1_1240
 Optimizer: Postgres-based planner
(11 rows)

Authored-by: Zhang Mingli avamingli@gmail.com

Fixes #ISSUE_Number

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• Bug fix (non-breaking change)
• New feature (non-breaking change)
• Breaking change (fix or feature with breaking changes)
• Documentation update

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• Unit tests added/updated
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• Passed make installcheck
• Passed make -C src/test installcheck-cbdb-parallel

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• Followed contribution guide
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• Reviewed code for security implications
• Requested review from cloudberry committers

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