test_{field,value}.py: array test cases: add non-sequence equality tests

test_{field,value}.py: array test cases: add non-sequence equality tests

The new tests verify that an array field or an array value is not equal
to another iterable object which would provide the correct element
values, but which is not a `collections.abc.Sequence`. This is similar
to how

    [1, 3, 5] == collections.OrderedDict([(1, 2), (3, 4), (5, 6)])

is false.

Signed-off-by: Philippe Proulx <eeppeliteloop@gmail.com>
Change-Id: If7402e4f0e747d2c9d17ddb5ce7aa4fc4156314d
Reviewed-on: https://review.lttng.org/c/babeltrace/+/1588
Tested-by: jenkins <jenkins@lttng.org>
Reviewed-by: Francis Deslauriers <francis.deslauriers@efficios.com>