Use cached property for table migration index on local checkout context (#3711)

## Changes

Use cached property for table migration index on local checkout context
to avoid multiple (re)crawling in case of an empty migration index

### Linked issues

Relates to #3687

### Functionality

- [x] modified existing command: `databricks labs ucx lint-local-code`

### Tests

- [x] manually tested

Author: JCZuurmond

src/databricks/labs/ucx/contexts/workspace_cli.py

@@ -21,7 +21,6 @@
 from databricks.labs.ucx.hive_metastore.federation import HiveMetastoreFederation, HiveMetastoreFederationEnabler
 from databricks.labs.ucx.hive_metastore.table_migration_status import TableMigrationIndex
 from databricks.labs.ucx.progress.install import ProgressTrackingInstallation
-from databricks.labs.ucx.source_code.base import CurrentSessionState
 from databricks.labs.ucx.source_code.linters.context import LinterContext
 from databricks.labs.ucx.source_code.linters.folders import LocalCodeLinter
 from databricks.labs.ucx.source_code.notebooks.loaders import NotebookLoader
@@ -213,24 +212,22 @@ class LocalCheckoutContext(WorkspaceContext):
     """Local context extends Workspace context to provide extra properties
     for running local operations."""
 
-    def linter_context_factory(self, session_state: CurrentSessionState | None = None):
+    @cached_property
+    def _migration_index(self) -> TableMigrationIndex:
         try:
             index = self.tables_migrator.index()
         except NotFound:
             logger.warning("Metastore does not seem to exist yet. Skipping loading of migration status.")
             index = TableMigrationIndex([])
-        if session_state is None:
-            session_state = CurrentSessionState()
-        return LinterContext(index, session_state)
+        return index
 
     @cached_property
     def local_code_linter(self) -> LocalCodeLinter:
-        session_state = CurrentSessionState()
         return LocalCodeLinter(
             self.notebook_loader,
             self.file_loader,
             self.folder_loader,
             self.path_lookup,
             self.dependency_resolver,
-            lambda: self.linter_context_factory(session_state),
+            lambda: LinterContext(self._migration_index),
         )