- Add log_test_case_step() to log test steps with a distinct 'TST'
source for visual clarity.
- Supports optional step numbering via the `numbered` argument.
- Reset the internal step counter before each test using
pytest_runtest_setup() in conftest.
- The 'TST' source clearly distinguishes test steps from standard
AUT log entries.
Change-Id: Id2f97dc292136c367f4ef3d5685a2376b3fdfec5
Signed-off-by: Andrew Vaillancourt <andrew.vaillancourt@windriver.com>
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