Test case reporting of not-implemented functionality not uniform

[skliper]

Is your feature request related to a problem? Please describe.
Various messages in the unit tests are used to report API's that are not implemented, and it's not trivial to get a list:

osal/src/tests/file-api-test/file-api-test.c

Lines 262 to 271 in 81c4fa8

	status = OS_chmod(filename, OS_WRITE_ONLY);
	if(status != OS_ERR_NOT_IMPLEMENTED){
	UtAssert_True(status == OS_SUCCESS, "status after chmod = %d", (int)status);
	status = OS_OpenCreate(&fd, filename, OS_FILE_FLAG_NONE, OS_WRITE_ONLY);
	UtAssert_True(status >= OS_SUCCESS, "status after reopen = %d", (int)status);
	status = OS_close(fd);
	UtAssert_True(status == OS_SUCCESS, "status after close = %d", (int)status);
	}else{
	UtPrintf("OS_chmod not implemented for write only\n");
	}

osal/src/unit-tests/oscore-test/ut_oscore_misc_test.c

Lines 263 to 268 in 81c4fa8

	res = OS_GetLocalTime(NULL);
	if (res == OS_ERR_NOT_IMPLEMENTED)
	{
	UT_OS_TEST_RESULT(testDesc, UTASSERT_CASETYPE_NA);
	goto UT_os_getlocaltime_test_exit_tag;
	}

Describe the solution you'd like
Utilize UTASSERT_CASETYPE_NA to report all OS_ERR_NOT_IMPLEMENTED returns. Also useful to know if it's the API or an option that is specifically being tested.

Describe alternatives you've considered
Macro

Additional context
See links above

Requester Info
Jacob Hageman - NASA/GSFC

[skliper]

Current path forward - consider adding a macro (could be part of #787) and change all NA reporting to use it.