Summary:
Commit 12e23adb6ac517cde3bacfcbe64a8292470701cf introduces a bad
assertion

    Assert(ARR_NDIM(arrayval) <= 2);

Not sure where that number came from or why the author though that was
the right thing to do.  This causes crashes in case arrays of dimension
greater than 2 are passed to a scalar array operation such as =ANY.  Fix
by removing the bad assertion.

Jira: DB-18947

Test Plan:
On Almalinux 8:

    ./yb_build.sh fastdebug --gcc13 daemons initdb --skip-pg-parquet \
      --java-test TestPgRegressHashInQueries

Backport-through: 2.20

Reviewers: amartsinchyk

Reviewed By: amartsinchyk

Subscribers: yql

Differential Revision: https://phorge.dev.yugabyte.com/D47907