Python: Fix CLI integration tests

Two issues:

- Tests relying on existing query machinery (i.e. `import python`) were not resolving
  correctly due to a bad `qlpack.yml` file.
- The diagnostics output tests needed an updated import to account for their new location.

codeql-workspace.yml

@@ -6,6 +6,7 @@ provide:
   - "*/ql/consistency-queries/qlpack.yml"
   - "*/ql/automodel/src/qlpack.yml"
   - "*/ql/automodel/test/qlpack.yml"
+  - "python/extractor/qlpack.yml"
   - "shared/**/qlpack.yml"
   - "cpp/ql/test/query-tests/Security/CWE/CWE-190/semmle/tainted/qlpack.yml"
   - "go/ql/config/legacy-support/qlpack.yml"

python/extractor/cli-integration-test/writing-diagnostics/test_diagnostics_output.py

@@ -1,6 +1,6 @@
 import os
 import sys
-sys.path.append(os.path.join(os.path.dirname(__file__), "..", "..", "..", "integration-tests"))
+sys.path.append(os.path.join(os.path.dirname(__file__), "..", "..", "..", "..", "..", "integration-tests"))
 import diagnostics_test_utils
 
 test_db = "db"

python/extractor/qlpack.yml

@@ -1,6 +1,6 @@
 name: extractor-python
 dependencies:
-  codeql/python-all: "*"
-  codeql/python-queries: "*"
+  codeql/python-all: ${workspace}
+  codeql/python-queries: ${workspace}
 extractor: python
 warnOnImplicitThis: true