ES missing coverage in cfe_es_apps.c, CFE_ES_CleanupTaskResources

[pepepr08]

Is your feature request related to a problem? Please describe.
CFE_ES_CleanupTaskResources function contains a hard to reach line (1723 below) that remains untested, preventing us from reaching 100% coverage in file.

        -: 1709:    /*
        -: 1710:    ** Delete the task itself
        -: 1711:    **
        -: 1712:    ** Note, if the task self exited, then the ID becomes invalid.
        -: 1713:    ** In this case the OS_ERR_INVALID_ID status is returned, but
        -: 1714:    ** that is OK, there is nothing else needed to do.
        -: 1715:    */
       74: 1716:    Result = OS_TaskDelete(OsalId);
       74: 1717:    if (Result == OS_SUCCESS || Result == OS_ERR_INVALID_ID)
        -: 1718:    {
       66: 1719:        Result = CleanState.OverallStatus;
      132: 1720:        if (Result == CFE_SUCCESS && CleanState.FoundObjects > 0)
        -: 1721:        {
        -: 1722:            /* Objects leftover after cleanup -- resource leak */
    #####: 1723:            Result = CFE_ES_APP_CLEANUP_ERR;
        -: 1724:        }
        -: 1725:    }

Describe the solution you'd like
Add coverage for line to complete 100% coverage in file.

Additional context
It's really difficult to recreate a case were CleanState.FoundObjects is greater than 0 since it always gets set to 0 in while(1)

https://github.com/nasa/cFE/blob/main/modules/es/fsw/src/cfe_es_apps.c#L1667-L1732

Requester Info
Jose F. Martinez Pedraza / NASA GSFC