chore: drop Makefile trailing newline and reuse utils.PROJECT_ROOT in bundle_apps

- utils/inventory/bundle_apps.py: replace the local REPO_ROOT
  `Path(__file__).resolve().parents[2]` with the canonical
  `from utils import PROJECT_ROOT`. Move `Iterable`/`Path` imports under
  `TYPE_CHECKING` since they are now only referenced in type hints.
- Makefile: strip trailing newline from the redeploy-bundles target file.

Makefile

@@ -388,4 +388,4 @@ deploy-bundles: down up
 
 # Redeploy all apps cumulated from inventory bundles on an existing inventory (no down/up, no entity purge; requires a prior deploy-bundles run).
 redeploy-bundles:
-	@bash scripts/tests/deploy/local/deploy/redeploy-bundles.sh
+	@bash scripts/tests/deploy/local/deploy/redeploy-bundles.sh

utils/inventory/bundle_apps.py

@@ -14,15 +14,18 @@ from __future__ import annotations
 
 import argparse
 import sys
-from pathlib import Path
-from typing import Iterable
+from typing import TYPE_CHECKING
 
+from utils import PROJECT_ROOT
 from utils.cache.yaml import load_yaml
 
-REPO_ROOT = Path(__file__).resolve().parents[2]
+if TYPE_CHECKING:
+    from collections.abc import Iterable
+    from pathlib import Path
+
 SEARCH_DIRS = (
-    REPO_ROOT / "inventories" / "bundles" / "servers",
-    REPO_ROOT / "inventories" / "bundles" / "workstations",
+    PROJECT_ROOT / "inventories" / "bundles" / "servers",
+    PROJECT_ROOT / "inventories" / "bundles" / "workstations",
 )