pgsql: Allow streaming the changes after speculative aborts.

Allow streaming the changes after speculative aborts.

Until now, we didn't allow to stream the changes in logical replication
till we receive speculative confirm or the next DML change record after
speculative inserts. The reason was that we never use to process
speculative aborts but after commit 4daa140a2f it is possible to process
them so we can allow streaming once we receive speculative abort after
speculative insertion.

We decided to backpatch to 14 where the feature for streaming in progress
transactions have been introduced as this is a minor change and makes that
functionality better.

Author: Amit Kapila
Reviewed-By: Dilip Kumar
Backpatch-through: 14
Discussion: https://postgr.es/m/CAA4eK1KdqmTCtrBR6oFfGELrLLbDLDedL6zACcsUOQuTJBj1vw@mail.gmail.com

Branch
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REL_14_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/dfceed30abc191c097557357dd6db56e875bb7e1

Modified Files
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src/backend/replication/logical/reorderbuffer.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)