Converted unit tests in src/controller/tests/data_model from NL to PW. (

#33371)

* Converted src/controller/tests/data_model from NL to PW.

* Updated to accomodate the fact that AppContext and LoopbackMessagingContext now have SetUp/SetUpTestSuite returning void.

* Comment cleanup.

* Reordered tests to fix dependency.

* Formatting

* Formatting

* Added comment warning of order dependence.

* Formatting

* Removed unneeded conditions from SetUpTestSuite/TearDownTestSuite.

src/controller/tests/data_model/BUILD.gn

@@ -14,12 +14,12 @@
 
 import("//build_overrides/build.gni")
 import("//build_overrides/chip.gni")
-import("//build_overrides/nlunit_test.gni")
+import("//build_overrides/pigweed.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 import("${chip_root}/src/platform/device.gni")
 
-chip_test_suite_using_nltest("data_model") {
+chip_test_suite("data_model") {
   output_name = "libDataModelTests"
 
   if (chip_device_platform != "mbed" && chip_device_platform != "efr32" &&
@@ -35,9 +35,7 @@ chip_test_suite_using_nltest("data_model") {
     "${chip_root}/src/app/tests:helpers",
     "${chip_root}/src/app/util/mock:mock_ember",
     "${chip_root}/src/controller",
-    "${chip_root}/src/lib/support:testing_nlunit",
     "${chip_root}/src/messaging/tests:helpers",
     "${chip_root}/src/transport/raw/tests:helpers",
-    "${nlunit_test_root}:nlunit-test",
   ]
 }