test(spm): use all constituents of memory share

On memory sharing operation use all the constituents within the
composite.

Extended memory lend operation test to include multiple scattered
pages to make sure the update to security state is happening
to all memory regions.

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: I2179df12ca63636bdb6489eea77e809422f95430
2 files changed