BUG #17695: Failed Assert in logical replication snapbuild.

The following bug has been logged on the website:

Bug reference:      17695
Logged by:          施博文
Email address:      zxwsbg@qq.com
PostgreSQL version: 14.6
Operating system:   centos
Description:

In PG14 or higher version, I notice that SnapBuildRestore don't set
builder->next_phase_at=InvalidTransactionId .

But in SnapBuildSerialize function, the assert check this condition.

Assert(builder->next_phase_at == InvalidTransactionId);

This would cause some problems, and I have repeat it with the perl test case
which I would update later, the problem is following:

TRAP: FailedAssertion("builder->next_phase_at == InvalidTransactionId",
File: "snapbuild.c", Line: 1604, PID: 29974)
postgres: master: walsender postgres [local]
START_REPLICATION(ExceptionalCondition+0xb9)[0xb1c9bd]
postgres: master: walsender postgres [local] START_REPLICATION[0x8f548d]
postgres: master: walsender postgres [local]
START_REPLICATION(SnapBuildProcessRunningXacts+0x55)[0x8f4c5c]
postgres: master: walsender postgres [local] START_REPLICATION[0x8dd8be]
postgres: master: walsender postgres [local]
START_REPLICATION(LogicalDecodingProcessRecord+0xd1)[0x8dd243]
postgres: master: walsender postgres [local] START_REPLICATION[0x915eb1]
postgres: master: walsender postgres [local] START_REPLICATION[0x91520c]
postgres: master: walsender postgres [local] START_REPLICATION[0x913bdd]
postgres: master: walsender postgres [local]
START_REPLICATION(exec_replication_command+0x42c)[0x914593]
postgres: master: walsender postgres [local]
START_REPLICATION(PostgresMain+0x7be)[0x984ddf]
postgres: master: walsender postgres [local] START_REPLICATION[0x8c0d41]
postgres: master: walsender postgres [local] START_REPLICATION[0x8c06b3]
postgres: master: walsender postgres [local] START_REPLICATION[0x8bc9c4]
postgres: master: walsender postgres [local]
START_REPLICATION(PostmasterMain+0x117a)[0x8bc29b]
postgres: master: walsender postgres [local] START_REPLICATION[0x7bdaf9]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f815dd92555]
postgres: master: walsender postgres [local] START_REPLICATION[0x488d09]