add unit test for op_add (#7087)

add op_add shapes to generate as binaries (#7087)

Summary:
generates the add model pte’s for cadence to execute on. will use graph builder in later diffs

Test Plan:
Imported from GitHub, without a `Test Plan:` line.
{F1968254537}

Reviewed By: hsharma35

Differential Revision: D66510372

Pulled By: zonglinpeng