Revert app info structure modification (#1300, #1911), relative to Draco development cycle

[skliper]

Is your feature request related to a problem? Please describe.
CFE_ES_AppInfo_t is public so the change in #1911/#1300 is breaking. Shouldn't have been included in Draco. Makes CS non-portable between Caelum and Draco.

Describe the solution you'd like
Revert.

Describe alternatives you've considered
Could add accessor functions or some sort of abstraction/layer or back-port, but the change really is very low priority. Could be considered in a future major update cycle if there's some actual benefit from the additional structure.

Could make CS adapt also (conditional compilation or whatever), but I don't think it's worth it for this sort of change or carrying that option.

Additional context
Need to decide if we want to reopen #1300 as future work or leave closed.

Requester Info
Jacob Hageman - NASA/GSFC