Fix solacc failure (#3077)

## Changes
Our nightly solacc CI job has been failing for a while.
This PR aims to fix that

### Linked issues
None

### Functionality
None

### Tests
- [x] manually tested: ran solacc CI job

---------

Co-authored-by: Eric Vergnaud <eric.vergnaud@databricks.com>

Author: ericvergnaud

src/databricks/labs/ucx/source_code/linters/files.py

@@ -1,5 +1,6 @@
 from __future__ import annotations  # for type hints
 
+import dataclasses
 import logging
 from collections.abc import Iterable, Callable
 from pathlib import Path
@@ -50,7 +51,11 @@ def build_dependency_graph(self, parent: DependencyGraph) -> list[DependencyProb
         if self._language is CellLanguage.PYTHON:
             context = parent.new_dependency_graph_context()
             analyzer = PythonCodeAnalyzer(context, self._original_code)
-            return analyzer.build_graph()
+            problems = analyzer.build_graph()
+            for idx, problem in enumerate(problems):
+                if problem.is_path_missing():
+                    problems[idx] = dataclasses.replace(problem, source_path=self._path)
+            return problems
         # supported language that does not generate dependencies
         if self._language is CellLanguage.SQL:
             return []

tests/integration/source_code/solacc.py

@@ -215,7 +215,7 @@ def _lint_dir(solacc: _SolaccContext, soldir: Path):
 
 
 def _lint_repos(clone_urls, sol_to_lint: str | None):
-    solacc = _SolaccContext.create(sol_to_lint is not None)
+    solacc = _SolaccContext.create(for_all_dirs=sol_to_lint is None)
     if sol_to_lint:
         sol_dir = _clone_repo(clone_urls[sol_to_lint], sol_to_lint)
         _lint_dir(solacc, sol_dir)