Replaced nlunit-test with pw_unit_test in src/lib/asn1/ (#33061)

* Replaced nlunit-test with pw_unit_test in src/lib/asn1/

* Restyled by clang-format

* Split complicated test assertion

---------

Co-authored-by: Restyled.io <commits@restyled.io>

Author: mbknust

src/lib/asn1/tests/BUILD.gn

@@ -14,21 +14,18 @@
 
 import("//build_overrides/build.gni")
 import("//build_overrides/chip.gni")
-import("//build_overrides/nlunit_test.gni")
 
 import("${chip_root}/build/chip/chip_test_suite.gni")
 
-chip_test_suite_using_nltest("tests") {
+chip_test_suite("tests") {
   output_name = "libASN1Tests"
 
   test_sources = [ "TestASN1.cpp" ]
 
   public_deps = [
     "${chip_root}/src/lib/asn1",
     "${chip_root}/src/lib/core",
-    "${chip_root}/src/lib/support:testing_nlunit",
     "${chip_root}/src/platform",
-    "${nlunit_test_root}:nlunit-test",
   ]
 
   cflags = [ "-Wconversion" ]