pgsql: Fix data inconsistency between publisher and subscriber.

Fix data inconsistency between publisher and subscriber.

We were not updating the partition map cache in the subscriber even when
the corresponding remote rel is changed. Due to this data was getting
incorrectly replicated for partition tables after the publisher has
changed the table schema.

Fix it by resetting the required entries in the partition map cache after
receiving a new relation mapping from the publisher.

Reported-by: Shi Yu
Author: Shi Yu, Hou Zhijie
Reviewed-by: Amit Langote, Amit Kapila
Backpatch-through: 13, where it was introduced
Discussion: https://postgr.es/m/OSZPR01MB6310F46CD425A967E4AEF736FDA49@OSZPR01MB6310.jpnprd01.prod.outlook.com

Branch
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REL_13_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/1f9a7738eb84f341a9b39689f33c887d1ef39487

Modified Files
--------------
src/backend/replication/logical/relation.c | 34 ++++++++++++++++++++++++++++++
src/backend/replication/logical/worker.c | 3 +++
src/include/replication/logicalrelation.h | 1 +
src/test/subscription/t/013_partition.pl | 17 ++++++++++++++-
4 files changed, 54 insertions(+), 1 deletion(-)