pgsql: Move provariadic sanity check to a more appropriate place

Move provariadic sanity check to a more appropriate place

35f059e9bdfb3b14ac9d22a9e159d36ec0ccf804 put the provariadic sanity
check into type_sanity.sql, even though it's not about types, and
moreover in the middle of some connected test group, which makes it
all very confusing. Move it to opr_sanity.sql, where it is in better
company.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/2613dec4ed67c4a963d987cbd29284e0634b65c9

Modified Files
--------------
src/test/regress/expected/opr_sanity.out | 31 +++++++++++++++++++++++++++++++
src/test/regress/expected/type_sanity.out | 31 -------------------------------
src/test/regress/sql/opr_sanity.sql | 26 ++++++++++++++++++++++++++
src/test/regress/sql/type_sanity.sql | 26 --------------------------
4 files changed, 57 insertions(+), 57 deletions(-)