tests/tracing: use pytest_collect_file() hook for YAML files

tests/tracing: use pytest_collect_file() hook for YAML files

This patch applies the same strategy as b1c5cbc ("tests/config/yaml: use
pytest_collect_file() hook for YAML files") to `tests/tracing`.

This patch changes `tests/tracing/conftest.py` so that it implements a
pytest_collect_file() Pytest hook to create Pytest file and item objects
for each barectf YAML configuration file found in the `configs`
directory. Thanks to the base name of this YAML file,
pytest_collect_file() automatically finds the corresponding
test-specific C source and expectation files.

This makes is possible to remove `test_succeed_static_array.py` and
avoid duplication and mismatches between existing YAML files and
available test functions.

Signed-off-by: Philippe Proulx <eeppeliteloop@gmail.com>