Patch documentation build for OSAL API file

[jphickey]

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
• I reviewed the cFS README.md file to see if the feature is in the major future work.
• I performed a cursory search to see if the feature request is relevant, not redundant, nor in conflict with other tickets.

Is your feature request related to a problem? Please describe.
Most CFS app documentation builds now depend on a file produced by the OSAL documentation build, but there is not (yet) a dependency encoded into the CMakeLists.txt file to ensure this gets produced before attempting the doc build.

Describe the solution you'd like
The correct solution is to add a dependency for the doc build into CMakeList.txt to each app that does have this dependency.

In the meantime, the failing workflow can be worked around by first forcing build of the OSAL API doxyfile.

Additional context
This would be just a short term patch to make the workflows run. Should be removed once the CFS apps are fixed.

Requester Info
Joseph Hickey, Vantage Systems, Inc.