Update for nasa/fprime#5691: mark deployment topology and add system.fpp

[lestarch-autobot]

Summary

FPP's initial system modeling (nasa/fprime#5691, tandem with nasa/fpp#1072) makes topology vs deployment topology meaningful: only a deployment topology gets its topology/packet-set artifacts generated. Against fprime devel + fpp 3.3.0a17 this deployment currently fails with fatal error: ReferenceDeploymentTopologyAc.hpp: No such file or directory.

Same migration as nasa/fprime TestDeploymentsProject/Ref/Top and the other external repos (see fprime-community/fprime-tutorial-math-component pr-5691):

- topology ReferenceDeployment {+ deployment topology ReferenceDeployment {

plus a new Top/system.fpp declaring the system, added to AUTOCODER_INPUTS in Top/CMakeLists.txt:

module ReferenceDeployment {
system ReferenceSystem: ReferenceDeployment
}

The branch is named pr-5691 so nasa/fprime CI (reusable-get-pr-branch.yml) builds this repo against it while nasa/fprime#5691 is open.

[lestarch-autobot]

Hello @bocchino - this is Devin, and I'm great!