fix(logger_log_level): use map for logger_log_level in scylla.yaml

logger_log_level Scylla configuration parameter is a map of logger class
to logger level, so we should use dict instead of string for setting this in
scylla_yaml.py

(cherry picked from commit 7843142)

sdcm/provision/scylla_yaml/scylla_yaml.py

@@ -325,7 +325,7 @@ def set_authorizer(cls, authorizer: str):
     redis_database_count: int = None  # 16
     redis_keyspace_replication_strategy: Literal['SimpleStrategy', 'NetworkTopologyStrategy'] = None  # 'SimpleStrategy'
     default_log_level: str = None  # None
-    logger_log_level: str = None  # None
+    logger_log_level: dict = None  # None
     log_to_stdout: bool = None  # None
     log_to_syslog: bool = None  # None
     authenticator_user: str = None  # None