time unit tests are broken if CFE_PLATFORM_TIME_CFG_SRC_MET is set to true

[aliounis]

Describe the bug
When attempting to run unit/coverage tests (SIMULATION=NATIVE, ENABLE_UNIT_TESTS=true) there is a compilation error for the time_UT.c unit test file if the CFE_PLATFORM_TIME_CFG_SRC_MET flag is set to true for the project. The compilation error appears to causes by references to undefined members of the CFE_TIME_Global structure (at minimum these are references to ClockSetState, AtToneMET, AtToneDelay, AtToneLatch, and AtToneMET. After doing a cursory investigation, it looks like these may have been moved to a substructure array ReferenceState, though I'm not certain since the unit test seems to imply they were scalar values but ReferenceState is an array of structs.

To Reproduce
Steps to reproduce the behavior:

1. Create a fresh cFS build
2. Change the CFE_PLATFORM_TIME_CFG_SRC_MET to true
3. Configure with SIMULATION=native, ENABLE_UNIT_TESTS=true
4. Attempt to build

Expected behavior
the unit tests should build and pass

Code snips
If applicable, add references to the software.

System observed on:

• Hardware Intel Xeon
• OS: ubuntu 22.4
• Versions at least >= 7.0.0-rc4 (confirmed the issue is still present in main)

Additional context
N/A

Reporter Info
Andrew Liounis, NASA/GSFC

[aliounis]

It looks like htis also might be an issue for other TIME_CFG_SRC selections

[thnkslprpt]

@skliper already applied a fix for CFE_PLATFORM_TIME_CFG_SRC_TIME here and that options builds fine (and the tests all pass).

I'll put a quick PR in for the other 2 options.