pgsql: Backpatch addition of pump_until() more completely.

Backpatch addition of pump_until() more completely.

In a2ab9c06ea1 I just backpatched the introduction of pump_until(), without
changing the existing local definitions (as 6da65a3f9a9). The necessary
changes seemed more verbose than desirable. However, that leads to warnings,
as I failed to realize...

Backpatch to all versions containing pump_until() calls before
f74496dd611 (there's none in 10).

Discussion: https://postgr.es/m/2808491.1651802860@sss.pgh.pa.us
Discussion: https://postgr.es/m/18b37361-b482-b9d8-f30d-6115cd5ce25c@enterprisedb.com
Backpatch: 11-14

Branch
------
REL_12_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/fbf659bc40409be03758d9fe2535c82895dd5d45

Modified Files
--------------
src/test/recovery/t/013_crash_restart.pl | 46 +++++++-------------------------
1 file changed, 10 insertions(+), 36 deletions(-)