Merge ~r00ta/maas:lp-2060278 into maas:master

[Jacopo Rota]

fix: lp-2060278. Rename image sync lock file to match other maas lock files

Other maas lock files have the prefix `maas:` and in the postrm script we run

```
rm -f /run/lock/maas:*
```

This change aims to follow the same pattern also for bootresources locks.

2abc02c... by Jacopo Rota on 2024-04-05

add test

fd2a0e7... by Jacopo Rota on 2024-04-05

fix test

[Anton Troyanov (troyanov)]

+1

FTR https://code.launchpad.net/~ack/maas/+git/maas/+merge/385888

review: Approve

[MAAS Lander (maas-lander)]

UNIT TESTS
-b lp-2060278 lp:~r00ta/maas/+git/maas into -b master lp:~maas-committers/maas

STATUS: SUCCESS
COMMIT: fd2a0e79a193f42d8f2fdad04fdc7523a7e3ba69

review: Approve

diff --git a/src/maasserver/utils/bootresource.py b/src/maasserver/utils/bootresource.py
index e41abaa..46166e8 100644
--- a/src/maasserver/utils/bootresource.py
+++ b/src/maasserver/utils/bootresource.py
@@ -270,7 +270,7 @@ class LocalBootResourceFile:
 
     @property
     def lock_file(self) -> Path:
-        return get_maas_lock_path() / f"bootres_{self.sha256}.lock"
+        return get_maas_lock_path() / f"maas:bootres_{self.sha256}.lock"
 
     def acquire_lock(self, try_lock: bool = False) -> bool:
         if self._lock_fd is None:
diff --git a/src/tests/maasserver/utils/test_bootresource.py b/src/tests/maasserver/utils/test_bootresource.py
index 7f376f1..66ac4be 100644
--- a/src/tests/maasserver/utils/test_bootresource.py
+++ b/src/tests/maasserver/utils/test_bootresource.py
@@ -187,3 +187,7 @@ class TestLocalBootResourceFile:
         f = LocalBootResourceFile(sha256=file_sha256, total_size=FILE_SIZE)
         assert f.acquire_lock(try_lock=True)
         f.release_lock()
+
+    def test_lock_path(self, image_store_dir: Path, file_sha256: str):
+        f = LocalBootResourceFile(sha256=file_sha256, total_size=FILE_SIZE)
+        assert f.lock_file.name.startswith("maas:bootres_")