Refactor resize test builder

Also add input size = 1 in the shape list, and extend scaling to
1x, 2x and 3x, so that the cases of broadcasting, power-of-two
scaling, no-scaling (e.g. 1x1 -> 1x1), scaling accuracy (3x) can
be tested. Since the scalar tensor is tiny, should not noticeably
impact the execution time of the framework test.

Change-Id: Iec53da3cbb60e087077d6e2d8eb205e76e6c1313
Signed-off-by: TatWai Chong <tatwai.chong@arm.com>