[OSCBS-41] Update to Zephyr v3.2.0 (#382)

Updating to integrate with Zephyr v3.2.0 required:

- Update `west.yml` to import Zephyr v3.2.0 manifest
- Prefix include pathname of ztest.h with `zephyr/`
- Prefix every Zephyr header included pathname with `zephyr/`
- Change all Zephyr tests/samples to use `find_package`
- For unit_testing, use a distinct prj.conf which only references
  Kconfigs defined in the Zephyr repo. (Zephyr constraint.)
- Move ztest headers into a zephyr-prefixed pathname

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

ports/zephyr/bacnet/bits.h

@@ -24,7 +24,7 @@
 #ifndef BITS_H
 #define BITS_H
 
-#include <sys/util.h>  /* defines BIT(n) */
+#include <zephyr/sys/util.h>  /* defines BIT(n) */
 
 /********************************************************************
 * Bit Masks

ports/zephyr/bacport.h

@@ -26,9 +26,9 @@
 #ifndef NET_H
 #define NET_H
 
-#include <net/net_ip.h>
-#include <net/socket.h>
-#include <zephyr.h>
+#include <zephyr/net/net_ip.h>
+#include <zephyr/net/socket.h>
+#include <zephyr/kernel.h>
 #include <bacnet/basic/object/device.h>
 
 static inline char *inet_ntoa(struct in_addr in) {

ports/zephyr/bip-init.c

@@ -34,13 +34,13 @@
 
 #include <stdint.h>
 #include <stdbool.h>
-#include <device.h>
-#include <init.h>
-#include <kernel.h>
-#include <sys/printk.h>
-#include <net/net_ip.h>
-#include <net/socket.h>
-#include <net/socket_select.h>
+#include <zephyr/device.h>
+#include <zephyr/init.h>
+#include <zephyr/kernel.h>
+#include <zephyr/sys/printk.h>
+#include <zephyr/net/net_ip.h>
+#include <zephyr/net/socket.h>
+#include <zephyr/net/socket_select.h>
 #include "bacnet/bacdcode.h"
 #include "bacnet/bacint.h"
 #include "bacnet/datalink/bip.h"
@@ -48,8 +48,8 @@
 #include "bacnet/basic/bbmd/h_bbmd.h"
 
 /* Logging module registration is already done in ports/zephyr/main.c */
-#include <logging/log.h>
-#include <logging/log_ctrl.h>
+#include <zephyr/logging/log.h>
+#include <zephyr/logging/log_ctrl.h>
 
 LOG_MODULE_DECLARE(bacnet, CONFIG_BACNETSTACK_LOG_LEVEL);
 

ports/zephyr/datetime-init.c

@@ -14,6 +14,8 @@
 #include <stdlib.h>
 #if CONFIG_NATIVE_APPLICATION
 #include <sys/time.h>
+#elif defined(__ZEPHYR__)
+#include <zephyr/posix/sys/time.h>
 #else
 #include <posix/sys/time.h>
 #endif

ports/zephyr/main.c

@@ -8,14 +8,14 @@
 #include <stdint.h>
 
 /* Zephyr includes */
-#include <init.h>
-#include <kernel.h>
-#include <sys/printk.h>
-#include <sys/util.h>
-#include <zephyr.h>
+#include <zephyr/init.h>
+#include <zephyr/kernel.h>
+#include <zephyr/sys/printk.h>
+#include <zephyr/sys/util.h>
+#include <zephyr/kernel.h>
 
 #define LOG_LEVEL CONFIG_BACNETSTACK_LOG_LEVEL
-#include <logging/log.h>
+#include <zephyr/logging/log.h>
 LOG_MODULE_REGISTER(bacnet);
 
 /* To do:  init()

ports/zephyr/mstimer-init.c

@@ -23,7 +23,7 @@
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *********************************************************************/
-#include <kernel.h>
+#include <zephyr/kernel.h>
 #include "bacnet/basic/sys/mstimer.h"
 
 /**