Support YAQL for generating array in with-items

Allow array in with-items clause to be generated by a YAQL evaluation. This allows for special use cases such as repeat and select subset from an array.

Examples:
with-items: n in range(0, $.count).list()
with-items: n in $.array.where($<3).list()
with-items: n in $.array.where($.name='abc').list()