Unit test hooks should not pass back pointers out of context

[skliper]

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
• I reviewed the CF 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.
Multiple cases of pointers getting passed back out of context:

CF/unit-test/utilities/ut_utils_cfe_hooks.c

Line 16 in 68c2d18

ctxt->Spec = UT_Hook_GetArgValueByName(Context, "Spec", const char *);

CF/unit-test/utilities/ut_utils_cfe_hooks.c

Line 28 in 68c2d18

ctxt->MsgPtr = UT_Hook_GetArgValueByName(Context, "MsgPtr", const CFE_MSG_Message_t *);

CF/unit-test/utilities/ut_utils_cfe_hooks.c

Line 41 in 68c2d18

ctxt->MsgPtr = UT_Hook_GetArgValueByName(Context, "MsgPtr", CFE_MSG_Message_t *);

CF/unit-test/utilities/ut_utils_cfe_hooks.c

Line 54 in 68c2d18

ctxt->MsgPtr = UT_Hook_GetArgValueByName(Context, "MsgPtr", CFE_MSG_Message_t *);

CF/unit-test/utilities/ut_utils_cfe_hooks.c

Line 67 in 68c2d18

ctxt->MsgPtr = UT_Hook_GetArgValueByName(Context, "MsgPtr", const CFE_MSG_Message_t *);

CF/unit-test/utilities/ut_utils_cfe_hooks.c

Line 80 in 68c2d18

ctxt->MsgPtr = UT_Hook_GetArgValueByName(Context, "MsgPtr", const CFE_MSG_Message_t *);

CF/unit-test/utilities/ut_utils_cfe_hooks.c

Line 93 in 68c2d18

ctxt->MsgPtr = UT_Hook_GetArgValueByName(Context, "MsgPtr", CFE_MSG_Message_t *);

CF/unit-test/utilities/ut_utils_cfe_hooks.c

Line 106 in 68c2d18

ctxt->MsgPtr = UT_Hook_GetArgValueByName(Context, "MsgPtr", CFE_MSG_Message_t *);

These could all be stale by the time they are checked.

Describe the solution you'd like
Clean up hooks. Remove info not needed, anything critical should either check in context or copy the information out.

Describe alternatives you've considered
None

Additional context
None

Requester Info
Jacob Hageman - NASA/GSFC