samples, tests: convert string-based twister lists to YAML lists

Twister now supports using YAML lists for all fields that were written
as space-separated lists. Used twister_to_list.py script. Some artifacts
on string length are due to how ruamel dumps content.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>

tests/ztest/base/testcase.yaml

@@ -14,7 +14,9 @@ tests:
   testing.ztest.base.verbose_0_userspace:
     filter: CONFIG_USERSPACE
     extra_args: CONF_FILE=prj_verbose_0.conf
-    tags: test_framework userspace
+    tags:
+      - test_framework
+      - userspace
     extra_configs:
       - CONFIG_TEST_USERSPACE=y
     integration_platforms:

tests/ztest/error_hook/testcase.yaml

@@ -1,19 +1,21 @@
 tests:
   testing.ztest.error_hook:
     filter: CONFIG_ARCH_HAS_USERSPACE
-    tags: test_framework userspace
+    tags:
+      - test_framework
+      - userspace
     ignore_faults: true
     testcases:
-    - catch_assert_fail
-    - catch_fatal_error
-    - catch_z_oops
-    - catch_assert_in_isr
+      - catch_assert_fail
+      - catch_fatal_error
+      - catch_z_oops
+      - catch_assert_in_isr
 
   testing.ztest.error_hook.no_userspace:
     extra_args: CONF_FILE=prj_no_userspace.conf
     tags: test_framework
     ignore_faults: true
     testcases:
-    - catch_fatal_error
-    - catch_assert_fail
-    - catch_assert_in_isr
+      - catch_fatal_error
+      - catch_assert_fail
+      - catch_assert_in_isr