pgsql: Remove configuration-dependent output from new inplace-inval tes

Remove configuration-dependent output from new inplace-inval test.

Per buildfarm members prion and trilobite.  Back-patch to v12 (all
supported versions), like commit
0844b3968985447ed0a6937cfc8639e379da2fe6.

Strategy reviewed by Tom Lane.

Discussion: https://postgr.es/m/20240628051353.a0.nmisch@google.com

Branch
------
REL_15_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/458fada72b3288d648a559a17c5a69f1d17ae15f

Modified Files
--------------
src/test/isolation/expected/inplace-inval.out | 10 +---------
src/test/isolation/specs/inplace-inval.spec   |  4 +++-
2 files changed, 4 insertions(+), 10 deletions(-)