Add unit tests for deploy strategies (OneOnEach, RoundRobin, Random)

[Yicong-Huang]

Task Summary

amber/src/main/scala/org/apache/texera/amber/engine/architecture/deploysemantics/deploystrategy/{OneOnEach,RoundRobinDeployment,RandomDeployment}.scala have no dedicated specs. Add unit tests for each strategy covering its initialize / next contract, the wrap-around or out-of-bounds boundary, and the empty-array edge case.

Task Type

• Testing / QA