Include filename in nosec 'no failed test' warning (#1363)

* Include filename in nosec "no failed test" warning

The warning about a nosec comment with no matching failed test only
included the line number, making it hard to locate the issue in
multi-file scans. Add the filename so the warning reads:

  nosec encountered (B608), but no failed test on file src/foo.py:42

Fixes #1269

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: 3 people

bandit/core/tester.py

@@ -112,7 +112,9 @@ def run_tests(self, raw_context, checktype):
                     ):
                         LOG.warning(
                             f"nosec encountered ({test._test_id}), but no "
-                            f"failed test on line {temp_context['lineno']}"
+                            f"failed test on file "
+                            f"{temp_context['filename']}:"
+                            f"{temp_context['lineno']}"
                         )
 
             except Exception as e: