pgsql: psql: Rework TAP routine psql_fails_like() to define WAL sender

psql: Rework TAP routine psql_fails_like() to define WAL sender context

The routine was coded so as a WAL sender was always used, state required
only for one failure test related to START_REPLICATION. This test is
changed so as a WAL sender is used by passing a replication option to
psql_fails_like(), instead of forcing the use of a WAL sender for all
the tests.

This has come up as useful in the context of a separate bug fix where
we are looking at extending tests for some failure scenarios. These
tests need to happen in the context of a normal backend, and not a WAL
sender where the extended query protocol cannot be used.

Discussion: https://postgr.es/m/aAXkJIOildLUA7vQ@paquier.xyz

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/0ff95e0a5be1372bfba9db284ea17c8e0e5da3a0

Modified Files
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src/bin/psql/t/001_basic.pl | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)