bug(maas): register the correct DatasourceMAASLocal in init-local

Incorrectly registering DataSourceMAAS for init-local DEP_FILESYSTEM
inadvertently short-circuits the _get_dat checks on network setup
from initramfs. This results in a 2 minute timeout on physical system
reboots. Correct this registration to do the proper checks and avoid
trying to perform GETs against the IMDS in init-local timeframe when
we know network is not yet available.

Fixes GH-5064

cloudinit/sources/DataSourceMAAS.py

@@ -319,7 +319,7 @@ class MAASSeedDirMalformed(Exception):
 
 # Used to match classes to dependencies
 datasources = [
-    (DataSourceMAAS, (sources.DEP_FILESYSTEM,)),
+    (DataSourceMAASLocal, (sources.DEP_FILESYSTEM,)),
     (DataSourceMAAS, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
 ]
 

tests/unittests/sources/test_common.py

@@ -46,7 +46,7 @@
     Hetzner.DataSourceHetzner,
     IBMCloud.DataSourceIBMCloud,
     LXD.DataSourceLXD,
-    MAAS.DataSourceMAAS,
+    MAAS.DataSourceMAASLocal,
     NoCloud.DataSourceNoCloud,
     OpenNebula.DataSourceOpenNebula,
     Oracle.DataSourceOracle,