Remove/replace `CFE_TIME_Copy` macro

[skliper]

Is your feature request related to a problem? Please describe.
The stated purpose (copy across different structures with Second/Subsecond fields) really is better avoided by using a common time structure.

Describe the solution you'd like
Remove CFE_TIME_Copy, use CFE_TIME_SysTime_t which enables simple assignment (x = y), or replace with more type-safe/inline function.

Describe alternatives you've considered
None

Additional context
Code review

Requester Info
Jacob Hageman - NASA/GSFC

[jphickey]

IIRC, the intent of doing this as a macro initially was because there were still some cases where a structure which was not CFE_TIME_SysTime_t had a "Seconds" and "Subseconds" field. In this case the non-type-specific aspect of the macro was desirable, as it would work with any struct that had a seconds and subseconds member, not required to be CFE_TIME_SysTime_t.

As long as all internal structs have been updated to CFE_TIME_SysTime_t then this should be doable, but I recall there might be a few cases still remaining of code storing seconds and subseconds without using the CFE_TIME_SysTime_t type.

[thnkslprpt]

Note: #2246 should clear up the remaining cases, but need to confirm.