Issues/issue 593 update to zephyr v3 6 0 (#601)

* [WIP] update manifest to zephyr v3.6.0

* [WIP] Deprecated ZTEST_NEW_API adjustments

Zephyr v3.6.0 removed Kconfig ZTEST_NEW_API.
The old ZTEST API is still used by non-Zephyr builds,
so the config setting is moved from `prj.conf` to
the test's CMakeLists.txt as `add_compile_definitions()`.

Verified by:

1. make clean all test

2. ./zephyr/scripts/twister -p unit_testing \
        -T bacnet-stack/zephyr/tests/

---------

Co-authored-by: Gregory Shue <gregory.shue@legrand.com>

zephyr/tests/bacnet/basic/object/command/CMakeLists.txt

@@ -77,3 +77,5 @@ else()
     ${TEST_OBJECT_SRC}/property_test.c
     )
 endif()
+
+add_compile_definitions(CONFIG_ZTEST_NEW_API)  # For exposing deprecated Kconfig

zephyr/tests/bacnet/basic/object/command/prj.conf

@@ -1,3 +1,2 @@
 CONFIG_ZTEST=y
-CONFIG_ZTEST_NEW_API=y
 CONFIG_BACNETSTACK=y